Prof. Carlos Lenz Cesar Profile

Prof. Carlos Lenz Cesar

Professor

SPIE Involvement:

Author

Publications (83)

Proceedings Article | 9 September 2019 Presentation

Optical forces from Rayleigh to Mie regime: theory and experiment (Conference Presentation)

Antonio Neves, Adriana Fontes, Wendel Moreira, Carlos Cesar

Proceedings Volume 11083, 110832B (2019) https://doi.org/10.1117/12.2530011

KEYWORDS: Geometrical optics, Particles, Optical tweezers, Electromagnetism, Laser scattering, Mie scattering, Scattering, Ray tracing, Electromagnetic scattering, Rayleigh scattering

Read Abstract +

SPIE Journal Paper | 4 December 2018 Open Access

Second-harmonic generation imaging analysis can help distinguish sarcoidosis from tuberculoid leprosy

Fabiane Leonel Utino, Marina Garcia, Paulo Eduardo Neves Ferreira Velho, Andréa Fernandes Eloy da Costa França, Rafael Fantelli Stelini, Vitor Bianchin Pelegati, Carlos Lenz Cesar, Elemir Macedo de Souza, Maria Letícia Cintra, Gislaine Vieira Damiani

JBO, Vol. 23, Issue 12, 126001, (December 2018) https://doi.org/10.1117/12.10.1117/1.JBO.23.12.126001

KEYWORDS: Second-harmonic generation, Collagen, Optical fibers, Skin, Signal detection, Statistical analysis, Microscopy, Absorbance, Tissues, Inflammation

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 21 September 2017 Presentation

Multi-modal microscopy platform including optical tweezers and the need to perform spherical wave vectors decompositions for optical force and signal intensity calculations (Conference Presentation)

Carlos Lenz Cesar, Wendel Moreira, Antonio A. Neves, André de Thomaz, Diogo Almeida, Adriana Fontes, Hernandes Carvalho, Vitor Pelegati

Proceedings Volume 10347, 1034718 (2017) https://doi.org/10.1117/12.2277331

Read Abstract +

Proceedings Article | 27 April 2016 Presentation

A force sensor using nanowire arrays to understand biofilm formation (Conference Presentation)

Prasana Sahoo, Alessandro Cavalli, Vitor Pelegati, Duber Murillo, Alessandra Souza, Carlos Cesar, Erik P. A. Bakkers, Monica Cotta

Proceedings Volume 9721, 97210C (2016) https://doi.org/10.1117/12.2213764

KEYWORDS: Nanowires, Sensors, Chemistry, Interfaces, Diagnostics, Adhesives, Proteins, Confocal microscopy, Imaging systems, Bacteria

Read Abstract +

Proceedings Article | 27 April 2016 Presentation

Filamentation and spatiotemporal distribution of extracellular polymeric substances: role on X.fastidiosa single cell adhesion and biofilm formation (Conference Presentation)

Richard Janissen, Duber Murillo, Barbara Niza, Prasana Sahoo, Moniellen Monteiro, Carlos César, Hernandes Carvalho, Alessandra de Souza, Monica Cotta

Proceedings Volume 9711, 97110H (2016) https://doi.org/10.1117/12.2213830

KEYWORDS: Polymers, Confocal microscopy, Microorganisms, Confocal fluorescent microscopy, Microscopy, Luminescence, Scanning probe microscopy, Green fluorescent protein, Biology, Proteins

Read Abstract +

Proceedings Article | 14 July 2015 Paper

Increased metabolic activity detected by FLIM in human breast cancer cells with desmoplastic reaction: a pilot study

Rodrigo de Andrade Natal, Vitor Pelegati, Caroline Bondarik, Guilherme Mendonça, Sophie Derchain, Carmen Lima, Carlos Cesar, Luís Sarian, José Vassallo

Proceedings Volume 9536, 95360L (2015) https://doi.org/10.1117/12.2183442

KEYWORDS: Luminescence, Fluorescence lifetime imaging, Breast cancer, Mode conditioning cables, Microscopy, Tumors, Nonlinear optics, Cancer, Tissues, Picosecond phenomena

Read Abstract +

Proceedings Article | 17 June 2013 Paper

Multiphoton intravital microscopy setup to visualize the mouse mammary gland

Javier Adur, Ana Herrera Torres, Andrius Masedunskas, Mariana Baratti, Andre de Thomaz, Vitor Pelegati, Hernandes Carvalho, Carlos Cesar

Proceedings Volume 8797, 879705 (2013) https://doi.org/10.1117/12.2032439

KEYWORDS: Mammary gland, Microscopy, Multiphoton microscopy, Visualization, Signal detection, Second-harmonic generation, Collagen, Sensors, Fluorescence lifetime imaging, CCD image sensors

Read Abstract +

Proceedings Article | 22 February 2013 Paper

Multimodal nonlinear optical microscopy used to discriminate human colon cancer

Javier Adur, Vitor Pelegati, Mariana Bianchi, André de Thomaz, Mariana Baratti, Hernandes Carvalho, Víctor Casco, Carlos Cesar

Proceedings Volume 8588, 85881J (2013) https://doi.org/10.1117/12.2001708

KEYWORDS: Second-harmonic generation, Fluorescence lifetime imaging, Tissues, Colorectal cancer, Nonlinear optics, Microscopy, Luminescence, Collagen, Colon, Signal detection

Read Abstract +

SPIE Journal Paper | 21 May 2012 Open Access

Quantitative changes in human epithelial cancers and osteogenesis imperfecta disease detected using nonlinear multicontrast microscopy

Javier Adur, Vitor Pelegati, André de Thomaz, Lilia D'Souza-Li, Maria do Carmo Assuncao, Fatima Bottcher-Luiz, Liliana Andrade, Carlos Lenz-Cesar

JBO, Vol. 17, Issue 8, 081407, (May 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.8.081407

KEYWORDS: Second-harmonic generation, Tissues, Fluorescence lifetime imaging, Tumors, Nonlinear optics, Microscopy, Collagen, Cancer, Skin, Diagnostics

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 16 February 2012 Paper

Influence of the growing parameters on the size distribution of PbTe nanoparticles produced by laser ablation under inert gas atmosphere

D. Almeida, E. Rodriguez, S. Agouram, R. Moreira, C. Cesar, E. Jimenez, L. Barbosa

Proceedings Volume 8245, 82450K (2012) https://doi.org/10.1117/12.909295

KEYWORDS: Nanoparticles, Argon, Transmission electron microscopy, Laser ablation, Pulsed laser deposition, Q switched lasers, Nd:YAG lasers, Quantum dots, Copper, Electron microscopes

Read Abstract +

Proceedings Article | 14 February 2012 Paper

Combined nonlinear laser imaging (two-photon excitation fluorescence, second and third-harmonic generation, and fluorescence lifetime imaging microscopies) in ovarian tumors

J. Adur, V. Pelegati, A. de Thomaz, F. Bottcher-Luiz, L. A. L. Andrade, D. Almeida, H. Carvalho, C. Cesar

Proceedings Volume 8226, 82261A (2012) https://doi.org/10.1117/12.906945

KEYWORDS: Fluorescence lifetime imaging, Tumors, Tissues, Second-harmonic generation, Microscopy, Luminescence, Nonlinear optics, Collagen, Ovarian cancer, Optical filters

Read Abstract +

Proceedings Article | 14 February 2012 Paper

Quantitative second-harmonic generation imaging to detect osteogenesis imperfecta in human skin samples

J. Adur, A. Ferreira, L. D'Souza-Li, V. Pelegati, A. de Thomaz, D. Almeida, M. Baratti, H. Carvalho, C. Cesar

Proceedings Volume 8226, 82263P (2012) https://doi.org/10.1117/12.907320

KEYWORDS: Collagen, Second-harmonic generation, Skin, Tissues, Bone, Statistical analysis, Image analysis, Harmonic generation, Microscopy, Genetics

Read Abstract +

Proceedings Article | 9 February 2012 Paper

Nonlinear optics for the study of human scar tissue

D. Ferro, G. Vieira-Damiani, R. Adam, C. Cesar, Konradin Metze

Proceedings Volume 8226, 82263J (2012) https://doi.org/10.1117/12.908922

KEYWORDS: Collagen, Second-harmonic generation, Optical fibers, Tissues, Luminescence, Nonlinear optics, Optical filters, Image filtering, Tissue optics, Photonics

Read Abstract +

Proceedings Article | 9 February 2012 Paper

Second-harmonic generation microscopy used to evaluate the effect of the dimethyl sulfoxide in the cryopreservation process in collagen fibers of differentiated chondrocytes

M. Andreoli-Risso, A. S. Duarte, T. Ribeiro, P. Bordeaux-Rego, A. Luzo, M. Baratti, J. Adur, A. de Thomaz, V. Pelegati, H. Carvalho, C. Cesar, P. Kharmadayan, F. Costa, S. Olalla-Saad

Proceedings Volume 8226, 82263G (2012) https://doi.org/10.1117/12.909284

KEYWORDS: Collagen, Stem cells, Second-harmonic generation, Microscopy, Tissues, Statistical analysis, Harmonic generation, Network architectures, Flow cytometry, Fourier transforms

Read Abstract +

Proceedings Article | 9 February 2012 Paper

Use of the second harmonic generation microscopy to evaluate chondrogenic differentiation of mesenchymal stem cells for cartilage repair

P. Bordeaux-Rego, M. Baratti, A. S. Duarte, T. Ribeiro, M. Andreoli-Risso, B. Vidal, J. Miranda, J. Adur, A. de Thomaz, V. Pelegati, F. Costa, H. Carvalho, C. Cesar, A. Luzo, S. Olalla Saad

Proceedings Volume 8226, 82263N (2012) https://doi.org/10.1117/12.909185

KEYWORDS: Cartilage, Collagen, Second-harmonic generation, Tissues, Stem cells, Microscopy, Harmonic generation, Injuries, Proteins, Bone

Read Abstract +

Proceedings Article | 9 February 2012 Paper

Multimodal optical setup for nonlinear and fluorescence lifetime imaging microscopies: improvement on a commercial confocal inverted microscope

V. Pelegati, J. Adur, A. de Thomaz, D. Almeida, M. Baratti, H. Carvalho, C. Cesar

Proceedings Volume 8225, 82251I (2012) https://doi.org/10.1117/12.909358

KEYWORDS: Second-harmonic generation, Fluorescence lifetime imaging, Confocal microscopy, Signal detection, Microscopy, Microscopes, Nonlinear optics, Tissues, Optical filters, Harmonic generation

Read Abstract +

Proceedings Article | 9 February 2012 Paper

Analysis of human aorta using fluorescence lifetime imaging microscopy (FLIM)

Gislaine Vieira-Damiani, J. Adur, D. Ferro, R. Adam, V. Pelegati, A. Thomáz, C. Cesar, K. Metze

Proceedings Volume 8226, 82260S (2012) https://doi.org/10.1117/12.908918

KEYWORDS: Fluorescence lifetime imaging, Collagen, Picosecond phenomena, Luminescence, Second-harmonic generation, Microscopy, Photonics, Proteins, Harmonic generation, Pathology

Read Abstract +

SPIE Journal Paper | 1 September 2011 Open Access

Recognition of serous ovarian tumors in human samples by multimodal nonlinear optical microscopy

Javier Adur, Vitor Pelegati, Leverson Costa, André de Thomaz, Diogo Almeida, Carlos Cesar, Luciana Pietro, Liliana Andrade, Fatima Bottcher-Luiz

JBO, Vol. 16, Issue 09, 096017, (September 2011) https://doi.org/10.1117/12.10.1117/1.3626575

KEYWORDS: Second-harmonic generation, Tissues, Collagen, Tumors, Microscopy, Ovarian cancer, Ovary, Nonlinear optics, Optical filters, Biopsy

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 9 June 2011 Paper

Multimodal nonlinear optical microscopy used to discriminate epithelial ovarian cancer

J. Adur, V. Pelegati, A. de Thomaz, D. Almeida, F. Bottcher-Luiz, L. A. L. Andrade, C. Cesar

Proceedings Volume 8086, 80860L (2011) https://doi.org/10.1117/12.889554

KEYWORDS: Second-harmonic generation, Microscopy, Tissues, Ovarian cancer, Collagen, Optical filters, Tissue optics, Tumors, Nonlinear optics, Biopsy

Read Abstract +

Proceedings Article | 11 February 2011 Paper

Characterization of third-degree burned skin by nonlinear microscopy technique

Moisés dos Santos, Vitor Pelegati, Carlos Cesar, Paulo Correa, Telma Maria Zorn, Denise Zezell

Proceedings Volume 7903, 79032Y (2011) https://doi.org/10.1117/12.878763

KEYWORDS: Collagen, Second-harmonic generation, Skin, Microscopy, Tissues, Microscopes, Wound healing, Pulsed laser operation, Image processing, Nonlinear optics

Read Abstract +

Proceedings Article | 8 February 2011 Paper

Elastic fibers and collagen distribution in human aorta

G. Vieira-Damiani, D. Ferro, R. Adam, A. de Thomaz, V. Pelegati, C. Cesar, K. Metze

Proceedings Volume 7903, 79030B (2011) https://doi.org/10.1117/12.874695

KEYWORDS: Collagen, Second-harmonic generation, Optical fibers, Visualization, Luminescence, Linear filtering, Harmonic generation, Confocal microscopy, Blood vessels, Resistance

Read Abstract +

Proceedings Article | 27 February 2010 Paper

Silica capped CdS/Cd(OH)[sub]2[/sub] quantum dots for biological applications

C. Chaves, D. Almeida, C. Cesar, A. Fontes, B. Santos, P. M. Farias

Proceedings Volume 7575, 757504 (2010) https://doi.org/10.1117/12.843182

KEYWORDS: Silica, Quantum dots, Coating, Cadmium sulfide, Absorption, Nanocrystals, Transmission electron microscopy, Nanoparticles, Atmospheric particles, Optical properties

Read Abstract +

Proceedings Article | 26 February 2010 Paper

Second harmonic generation in human ovarian neoplasias

L. Lamonier, F. Bottcher-Luiz, L. Pietro, L. A. L. Andrade, A. de Thomaz, C. Machado, C. Cesar

Proceedings Volume 7569, 75691U (2010) https://doi.org/10.1117/12.842576

KEYWORDS: Tumors, Collagen, Tissues, Second-harmonic generation, Biopsy, Harmonic generation, Polymerization, Structured optical fibers, Signal detection, Surface plasmons

Read Abstract +

Proceedings Article | 25 February 2010 Paper

Confocal microscopy for automatic measurement of the density and distance between elastin fibers of histologic preparations of normotensive and hypertensive patients

G. Vieira, D. Ferro, R. Adam, A. de Thomaz, C. Cesar, K. Metze

Proceedings Volume 7568, 75680K (2010) https://doi.org/10.1117/12.842394

KEYWORDS: Confocal microscopy, Luminescence, Optical fibers, Microscopes, Distance measurement, Microscopy, Arteries, Laser scanners, Tissues, Heart

Read Abstract +

Proceedings Article | 18 February 2010 Paper

Studying nanotoxic effects of CdTe quantum dots in Trypanosoma cruzi

C. Stahl, D. Almeida, A. de Thomaz, A. Fontes, R. F. Menna-Barreto, J. Santos-Mallet, C. Cesar, S. A. Gomes, D. Feder

Proceedings Volume 7575, 757513 (2010) https://doi.org/10.1117/12.842558

KEYWORDS: Quantum dots, Toxicity, Nanoparticles, In vivo imaging, In vitro testing, Cadmium, Transmission electron microscopy, Control systems, Plasma, Nanocrystals

Read Abstract +

Proceedings Article | 4 December 2009 Paper

Glass doped with semiconductor nanoparticles for optical devices

E. Rodriguez, L. Ponce, M. Arronte, E. de Posada, G. Kellerman, C. César, L. Barbosa

Proceedings Volume 7499, 749917 (2009) https://doi.org/10.1117/12.849064

KEYWORDS: Nanoparticles, Glasses, Multilayers, Plasma enhanced chemical vapor deposition, Absorption, Semiconductors, Time multiplexed optical shutter, Optical components, Scattering, Silica

Read Abstract +

Proceedings Article | 2 September 2009 Paper

Thiol capped colloidal CdTe quantum dots synthesized using laser ablation

D. Almeida, E. Rodriguez, R. Moreira, S. Agouram, L. Barbosa, E. Jimenez, C. Cesar

Proceedings Volume 7393, 739304 (2009) https://doi.org/10.1117/12.826211

KEYWORDS: Laser ablation, Quantum dots, Nanoparticles, Luminescence, Absorption, Bioalcohols, Molecules, Particles, Semiconductors, Liquids

Read Abstract +

Proceedings Article | 20 August 2009 Paper

Evidence of chemotaxis by quantitative measurement of the force vectors of Trypanossoma cruzi in the vicinity of the Rhodnius prolixus midgut wall cell

A. de Thomaz, D. Almeida, A. Fontes, C. Stahl, J. Santos-Mallet, S. A. Gomes, D. Feder, C. Cesar

Proceedings Volume 7400, 740009 (2009) https://doi.org/10.1117/12.826314

KEYWORDS: Optical tweezers, Microorganisms, Calibration, Light scattering, Sensors, Transducers, Time metrology, Bacteria, Signal detection, Motion measurement

Read Abstract +

Proceedings Article | 10 July 2009 Paper

Laser ablation synthesis route of CdTe colloidal quantum dots for biological applications

D. Almeida, E. Rodriguez, R. Moreira, S. Agouram, L. Barbosa, E. Jimenez, C. Cesar

Proceedings Volume 7371, 73710F (2009) https://doi.org/10.1117/12.831723

KEYWORDS: Nanoparticles, Quantum dots, Molecules, Laser ablation, Luminescence, Bioalcohols, Absorption, Particles, Silica, Liquids

Read Abstract +

Proceedings Article | 1 July 2009 Paper

Confocal microscopy for automatic texture analysis of elastic fibers in histologic preparations

R. Adam, G. Vieira, D. Ferro, A. de Thomaz, C, Cesar, K. Metze

Proceedings Volume 7367, 73671O (2009) https://doi.org/10.1117/12.831535

KEYWORDS: Optical fibers, Tissues, Confocal microscopy, Luminescence, Tumors, Microscopes, Skin, Lung, Arteries, Cartilage

Read Abstract +

Proceedings Article | 1 July 2009 Paper

Optical tweezers force measurements to study parasites chemotaxis

A. de Thomaz, L. Pozzo, A. Fontes, D. Almeida, C. Stahl, J. Santos-Mallet, S. A. Gomes, D. Feder, D. Ayres, S. Giorgio, C. Cesar

Proceedings Volume 7367, 73671A (2009) https://doi.org/10.1117/12.831480

KEYWORDS: Optical tweezers, Microorganisms, Sensors, Calibration, Optical testing, Glucose, Time metrology, Light scattering, Signal detection, Intestine

Read Abstract +

Proceedings Article | 4 September 2008 Paper

Simple silanization routes of CdSe and CdTe nanocrystals for biological applications

Diogo Almeida, Wagner Faustino, Gilberto Jacob, André de Thomaz, Luiz Barbosa, Oswaldo Alves, Patricia Farias, Beate Santos, Adriana Fontes, Suzete Gomes, Denise Feder, Italo Mazali, Carlos Cesar

Proceedings Volume 7030, 70300I (2008) https://doi.org/10.1117/12.795436

KEYWORDS: Silica, Quantum dots, Nanocrystals, Bioalcohols, Confocal microscopy, Cadmium, Selenium, Sodium, Absorption, Natural surfaces

Read Abstract +

Proceedings Article | 29 August 2008 Paper

Study of optically trapped living Trypanosoma cruzi/Trypanosoma rangeli - Rhodnius prolixus interactions by real time confocal images using CdSe quantum dots

A. de Thomaz, D. Almeida, W. Faustino, G. Jacob, A. Fontes, L. Barbosa, C. Cesar, C. Stahl, J. Santos-Mallet, S. Gomes, D. Feder

Proceedings Volume 7038, 703810 (2008) https://doi.org/10.1117/12.795370

KEYWORDS: Confocal microscopy, Optical tweezers, Quantum dots, Intestine, Luminescence, Blood, Microscopes, Microorganisms, Objectives, Video

Read Abstract +

Proceedings Article | 22 February 2008 Paper

Quantum confinement effects on the phonons of PbTe quantum dots in tellurite glasses

G. Jacob, D. Almeida, W. Faustino, E. Rodrigues, C. Brito, L. Barbosa, C. Cesar

Proceedings Volume 6892, 689207 (2008) https://doi.org/10.1117/12.761680

KEYWORDS: Quantum dots, Phonons, Glasses, Raman spectroscopy, Acoustics, Lead, Absorption, Borosilicate glass, Oxides, Tellurium

Read Abstract +

Proceedings Article | 14 February 2008 Paper

PbTe quantum dots grown by femtosecond laser ablation

E. Rodriguez, D. Biggemann, L. Moya, W. Pippo, R. Moreira, D. Silva, C. Cesar, L. Barbosa, A. Schrank, C. Souza Filho, E. de Oliveira

Proceedings Volume 6892, 68921U (2008) https://doi.org/10.1117/12.761712

KEYWORDS: Nanoparticles, Laser ablation, Femtosecond phenomena, Quantum dots, Thermal effects, Pulsed laser operation, Thin films, Pulsed laser deposition, Particles, Transmission electron microscopy

Read Abstract +

Proceedings Article | 11 February 2008 Paper

PbTe quantum dots in tellurite glass microstructured optical fiber

G. Jacob, D. Almeida, W. Faustino, E. Chillcce, E. Rodriguez, C. Brito Cruz, L. Barbosa, C. Cesar

Proceedings Volume 6902, 690206 (2008) https://doi.org/10.1117/12.761563

KEYWORDS: Glasses, Optical fibers, Quantum dots, Absorption, Photonic glasses, Borosilicate glass, Oxides, Structured optical fibers, Transmission electron microscopy, Tellurium

Read Abstract +

Proceedings Article | 5 February 2008 Paper

Carbon nanotube-doped tellurite glasses

I. Mazali, E. Chillcce, O. Ferreira, E. Rodriguez, G. Jacob, C. Cesar, L. Barbosa

Proceedings Volume 6890, 689011 (2008) https://doi.org/10.1117/12.761816

KEYWORDS: Glasses, Refractive index, Carbon nanotubes, Nonlinear optics, Silica, Crystals, Raman spectroscopy, Carbon, Platinum, Oxidation

Read Abstract +

SPIE Journal Paper | 1 January 2008 Open Access

Measuring electrical and mechanical properties of red blood cells with double optical tweezers

Adriana Fontes, Heloise Fernandes, André Thomaz, Luiz Barbosa, Maria Barjas-Castro, Carlos Cesar

JBO, Vol. 13, Issue 01, 014001, (January 2008) https://doi.org/10.1117/12.10.1117/1.2870108

KEYWORDS: Optical tweezers, Blood, Proteins, Silica, Ions, Particles, Optical testing, Velocity measurements, Clouds, Dielectrics

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 25 September 2007 Paper

PbTe quantum dots multilayer for optical switching device

E. Rodriguez, G. Kellermann, L. Moya, R. Moreira, A. Craievich, E. Jimenez, C. César, L. Barbosa

Proceedings Volume 6640, 66400E (2007) https://doi.org/10.1117/12.734661

KEYWORDS: X-rays, Particles, Nanoparticles, Quantum dots, Absorption, Multilayers, Glasses, Optical switching, Scattering, Fabry–Perot interferometers

Read Abstract +

Proceedings Article | 17 September 2007 Paper

PbTe thin films grown by femtosecond pulsed laser deposition

E. Rodriguez, D. Silva, Lourdes Moya, C. Cesar, L. Barbosa, A. Schrank, C. Souza Filho, E. de Oliveira

Proceedings Volume 6698, 669809 (2007) https://doi.org/10.1117/12.738871

KEYWORDS: Thin films, Thin film growth, Femtosecond phenomena, Scanning electron microscopy, Pulsed laser deposition, Laser energy, Glasses, Thin film deposition, Absorption, Thermal effects

Read Abstract +

Proceedings Article | 5 September 2007 Paper

Studying red blood cell agglutination by measuring membrane viscosity with optical tweezers

Heloise Fernandes, Adriana Fontes, André de Thomaz, Luiz Barbosa, Maria Barjas-Castro, Carlos Cesar

Proceedings Volume 6644, 66440M (2007) https://doi.org/10.1117/12.734284

KEYWORDS: Optical tweezers, Proteins, Blood, Control systems, Silica, Surface plasmons, Rhodium, Statistical analysis, Hematology, Velocity measurements

Read Abstract +

Proceedings Article | 5 September 2007 Paper

Optical tweezers and multiphoton microscopies integrated photonic tool for mechanical and biochemical cell processes studies

A. de Thomaz, W. Faustino, A. Fontes, H. Fernandes, M. Barjas-Castro, K. Metze, S. Giorgio, L. Barbosa, C. Cesar

Proceedings Volume 6644, 66440H (2007) https://doi.org/10.1117/12.734495

KEYWORDS: Confocal microscopy, Optical tweezers, Luminescence, Multiphoton microscopy, Microscopy, Second-harmonic generation, Photonics, Cell mechanics, Optical fibers, Spatial resolution

Read Abstract +

Proceedings Article | 13 July 2007 Paper

Studying red blood cell agglutination by measuring electrical and mechanical properties with a double optical tweezers

Adriana Fontes, Heloise Fernandes, André de Thomaz, Luiz Barbosa, Maria L. Barjas-Castro, Carlos Cesar

Proceedings Volume 6633, 66330R (2007) https://doi.org/10.1117/12.728447

KEYWORDS: Optical tweezers, Blood, Proteins, Silica, Ions, Particles, Geometrical optics, Optical testing, Clouds, Objectives

Read Abstract +

Proceedings Article | 26 February 2007 Paper

Star cross section polymer fiber for evanescent field optical sensors

E. Chillcce, W. Faustino, G. Jacob, E. Rodriguez, W. Moreira, C. Cesar, L. Barbosa

Proceedings Volume 6469, 64690V (2007) https://doi.org/10.1117/12.700862

KEYWORDS: Polymethylmethacrylate, Stars, Polymers, Europium, Luminescence, Polymer optical fibers, Optical fibers, Solids, Optical sensors, Fiber lasers

Read Abstract +

Proceedings Article | 20 February 2007 Paper

Use of CsCl to enhance the glass stability range of tellurite glasses for Er3+ doped optical fiber drawing

Carmen Rosa Eyzaguirre, Eugenio Rodriguez, Enver Fernandez Chillcce, Sérgio Paulo Amaral Osório, Carlos Lenz Cesar, Italo Odone Mazali, Oswaldo Luiz Alves, Luiz Carlos Barbosa

Proceedings Volume 6469, 646915 (2007) https://doi.org/10.1117/12.700184

KEYWORDS: Glasses, Optical fibers, Erbium, Bismuth, Refractive index, Ions, Chlorine, Single mode fibers, Silica, Crystals

Read Abstract +

Proceedings Article | 20 February 2007 Paper

Development of soft-glasses photonic crystal fiber made by stacking-and-draw technique

E. Chillcce, C. Cordeiro, R. Ramos, B. C. Honório, E. Rodriguez, G. Jacob, C. Brito Cruz, C. Cesar, L. Barbosa

Proceedings Volume 6469, 64690U (2007) https://doi.org/10.1117/12.701141

KEYWORDS: Optical fibers, Glasses, Lead, Signal attenuation, Photonic crystal fibers, Capillaries, Borosilicate glass, Refractive index, Crystals, Lamps

Read Abstract +

Proceedings Article | 19 February 2007 Paper

Leishmania amazonensis chemotaxis under glucose gradient studied by the strength and directionality of forces measured with optical tweezers

Liliana de Ysasa Pozzo, Adriana Fontes, André de Thomaz, Luiz Carlos Barbosa, Diana Copi Ayres, Selma Giorgio, Carlos Lenz Cesar

Proceedings Volume 6441, 64411R (2007) https://doi.org/10.1117/12.701196

KEYWORDS: Glucose, Microorganisms, Optical tweezers, Sensors, Optical testing, Diffusion, Nd:YAG lasers, Light scattering, Calibration, Particles

Read Abstract +

Proceedings Article | 9 February 2007 Paper

Exact theory of optical forces of Mie scatterers exposed to high numerical aperture beams examined with 3D photonic force measurements

Antonio Neves, Adriana Fontes, Wendel Moreira, André de Thomaz, Diogo de Almeida, Luiz Barbosa, Carlos Cesar

Proceedings Volume 6483, 648309 (2007) https://doi.org/10.1117/12.700935

KEYWORDS: Optical tweezers, Optical spheres, Particles, Beam shaping, Polarization, Electromagnetism, 3D metrology, Objectives, Spherical lenses, Diffraction

Read Abstract +

Proceedings Article | 6 February 2007 Paper

A study by GISAXS of PbTe/SiO2 multilayer deposited on Si(111)

G. Kellermann, E. Rodriguez, E. Jimenez, E. Chillcce, C. Cesar, L. Barbosa

Proceedings Volume 6481, 64810A (2007) https://doi.org/10.1117/12.701082

KEYWORDS: X-rays, Nanoparticles, Scattering, Multilayers, Particles, Quantum dots, Plasma enhanced chemical vapor deposition, Fabrication, Laser scattering, Reflectometry

Read Abstract +

Proceedings Article | 14 September 2006 Paper

SiO2/PbTe quantum dots multilayers for the 1.3-1.5 µm region

E. Rodriguez, E. Jimenez, E. Chillcce, C. César, L. Barbosa

Proceedings Volume 6321, 63210L (2006) https://doi.org/10.1117/12.681257

KEYWORDS: Nanoparticles, Multilayers, Glasses, Electrodes, Refractive index, Time multiplexed optical shutter, Argon, Quantum dots, Dielectrics, Absorption

Read Abstract +

Proceedings Article | 11 September 2006 Paper

Chemotaxis study using optical tweezers to observe the strength and directionality of forces of Leishmania amazonensis

Liliana Pozzo, Adriana Fontes, André de Thomaz, Luiz Barbosa, Diana Ayres, Selma Giorgio, Carlos Cesar

Proceedings Volume 6326, 63262A (2006) https://doi.org/10.1117/12.680999

KEYWORDS: Optical tweezers, Microorganisms, Sensors, Glucose, Diffusion, Nd:YAG lasers, Light scattering, Signal detection, Calibration, Dielectrics

Read Abstract +

Proceedings Article | 31 August 2006 Paper

Two-photon absorption in direct bandgap semiconductors quantum dots

Lazaro Padilha, Jie Fu, G. Nootz, David Hagan, Eric Van Stryland, D. Buso, A. Martucci, Carlos Cesar, Luiz Barbosa, Carlos H. B. Cruz

Proceedings Volume 6327, 63270M (2006) https://doi.org/10.1117/12.681160

KEYWORDS: Quantum dots, Absorption, Semiconductors, Data modeling, Nanocrystals, Oscillators, Quantum optics, Nonlinear optics, Borosilicate glass, Glasses

Read Abstract +

Proceedings Article | 30 August 2006 Paper

Exact partial wave expansion of optical beams with respect to arbitrary origin

Antônio Neves, Adriana Fontes, Wendel Moreira, André de Thomaz, Diogo Burigo de Almeida, Luiz Barbosa, Carlos Cesar

Proceedings Volume 6326, 63260J (2006) https://doi.org/10.1117/12.680898

KEYWORDS: Beam shaping, Objectives, Spherical lenses, Electromagnetism, Particles, Diffraction, Polarization, Solids, Gaussian beams, Laser scattering

Read Abstract +

Proceedings Article | 30 August 2006 Paper

Measuring electrical and mechanical properties of red blood cells with a double optical tweezers

Adriana Fontes, Heloise Fernandes, Maria Barjas-Castro, André de Thomaz, Liliana Pozzo, Luiz Barbosa, Carlos Cesar

Proceedings Volume 6326, 63260N (2006) https://doi.org/10.1117/12.680900

KEYWORDS: Optical tweezers, Blood, Silica, Proteins, Clouds, Ions, Particles, Geometrical optics, Calibration, Microfluidics

Read Abstract +

Proceedings Article | 30 August 2006 Paper

Double optical tweezers for 3D photonic force measurements of Mie scatterers

Antônio Neves, Adriana Fontes, Wendel Moreira, André de Thomaz, Diogo Burigo de Almeida, Luíz Barbosa, Carlos Cesar

Proceedings Volume 6326, 63260L (2006) https://doi.org/10.1117/12.680859

KEYWORDS: Optical tweezers, Optical spheres, 3D metrology, 3D modeling, Polarization, Particles, Diffraction, Scatter measurement, Dielectric polarization, Dielectrics

Read Abstract +

Proceedings Article | 24 August 2006 Paper

Micro-structured Er3+-Tm3+ co-doped tellurite fiber for broadband optical amplifier around 1550 nm

E. Chillcce, C. Cordeiro, R. Ramos, B. Honorio, E. Rodriguez, C. Brito Cruz, C. Cesar, L. Barbosa

Proceedings Volume 6314, 63140W (2006) https://doi.org/10.1117/12.681277

KEYWORDS: Erbium, Structured optical fibers, Glasses, Capillaries, Optical fibers, Thulium, Optical amplifiers, Silica, Fabrication, Supercontinuum generation

Read Abstract +

Proceedings Article | 27 March 2006 Paper

Application of colloidal semiconductor quantum dots as fluorescent labels for diagnosis of brain glial cancer

Patrícia Farias, Beate Santos, Frederico Menezes, Ricardo Ferreira, Fernando Oliveira, Hernandes Carvalho, Luciana Romão, Vivaldo Moura-Neto, Jane Amaral, Adriana Fontes, Carlos Cesar

Proceedings Volume 6096, 60961B (2006) https://doi.org/10.1117/12.646866

KEYWORDS: Luminescence, Quantum dots, Confocal microscopy, Cancer, Glia, Microscopy, Semiconductors, Brain, Fluorescent markers, Diagnostics

Read Abstract +

Proceedings Article | 28 February 2006 Paper

Waveguides produced by ion-exchange in Er³⁺-doped tellurite glass

V. A. G. Rivera, E. F. Chillcce, E. Rodriguez, I. O. Mazali, C. L. Cesar, L. C. Barbosa

Proceedings Volume 6116, 61160Z (2006) https://doi.org/10.1117/12.646999

KEYWORDS: Glasses, Waveguides, Erbium, Ions, Channel waveguides, Ion exchange, Signal attenuation, Silver, Sodium, Absorption

Read Abstract +

Proceedings Article | 28 February 2006 Paper

Photothermal spectroscopic characterization in tellurite glasses codoped with rare-earth ions

Viviane Pilla, Enver Chillcce, Eugenio Rodriguez, Thomaz Catunda, Egberto Munin, Carlos Cesar, Luiz Barbosa

Proceedings Volume 6116, 61160X (2006) https://doi.org/10.1117/12.646583

KEYWORDS: Glasses, Thulium, Erbium, Luminescence, Laser beam diagnostics, Spectroscopy, Quantum efficiency, Ions, Absorption, Absorbance

Read Abstract +

Proceedings Article | 28 February 2006 Paper

Er³⁺-doped tellurite glass waveguides produced by fiber on glass (FOG) method

V. Rivera, E. Rodriguez, E. Chillcce, I. Mazali, C. Cesar, L. Barbosa

Proceedings Volume 6116, 611610 (2006) https://doi.org/10.1117/12.647152

KEYWORDS: Glasses, Fiber optic gyroscopes, Erbium, Waveguides, Optical fibers, Ions, Crystals, Refractive index, Optics manufacturing, Scanning electron microscopy

Read Abstract +

Proceedings Article | 22 February 2006 Paper

Tellurite photonic crystal fiber with Er³⁺-Tm³⁺ for broadband optical amplifier in 1550nm

E. Chillcce, C. Cordeiro, E. Rodriguez, C. Brito Cruz, C. César, L. Barbosa

Proceedings Volume 6116, 611604 (2006) https://doi.org/10.1117/12.646530

KEYWORDS: Erbium, Thulium, Glasses, Photonic crystal fibers, Capillaries, Optical amplifiers, Silica, Fiber lasers, Solids, Fabrication

Read Abstract +

Proceedings Article | 21 February 2006 Paper

Monitoring activity of living cells marked with colloidal semiconductor quantum dots

Patricia Farias, Beate Santos, Frederico Menezes, Aluizio Brasil, Jr., Liliane Lima, Diego Silva, Alice Vieira, Ricardo Ferreira, Adriana Fontes, Diogo Almeida, Luiz Barbosa, Carlos Cesar

Proceedings Volume 6088, 60880G (2006) https://doi.org/10.1117/12.646817

KEYWORDS: Quantum dots, Glucose, Yeast, Luminescence, Nanocrystals, Semiconductors, Confocal microscopy, Molecules, Tellurium, Absorption

Read Abstract +

Proceedings Article | 21 February 2006 Paper

Red blood cell membrane viscoelasticity, agglutination, and zeta potential measurements with double optical tweezers

Adriana Fontes, Heloise Fernandes, Maria Barjas-Castro, André de Thomaz, Liliana de Ysasa Pozzo, Luiz Barbosa, Carlos Cesar

Proceedings Volume 6088, 608811 (2006) https://doi.org/10.1117/12.646682

KEYWORDS: Optical tweezers, Blood, Silica, Optical testing, Proteins, Calibration, Particles, Ions, Geometrical optics, Velocity measurements

Read Abstract +

Proceedings Article | 10 February 2006 Paper

Molecular differentiation of Leishmania protozoarium using CdS quantum dots as biolabels

Beate Santos, Patrícia de Farias, Frederico de Menezes, Erick Mariano, Ricardo de C. Ferreira, Selma Giorgio, Maira Bosetto, Diana Ayres, Paulo Lima, Adriana Fontes, André de Thomas, Carlos Cesar

Proceedings Volume 6097, 609706 (2006) https://doi.org/10.1117/12.646912

KEYWORDS: Atmospheric particles, Confocal microscopy, Nanoparticles, Nanocrystals, Luminescence, Quantum dots, Cadmium sulfide, Molecules, Particles, Organisms

Read Abstract +

Proceedings Article | 9 February 2006 Paper

Optical tweezers 3D photonic force spectroscopy

Antonio Neves, Adriana Fontes, Wendel Moreira, André de Thomaz, Diogo de Almeida, Luiz Barbosa, Carlos Cesar

Proceedings Volume 6131, 61310F (2006) https://doi.org/10.1117/12.646899

KEYWORDS: Optical tweezers, Particles, Dielectric polarization, Optical spheres, Objectives, Spectroscopy, Nd:YAG lasers, Polarization, Microscopes, Mirrors

Read Abstract +

Proceedings Article | 7 February 2006 Paper

One-dimensional photonic crystal for the 1.3-1.5 μm region

E. Rodriguez, E. Jimenez, C. César, L. Barbosa

Proceedings Volume 6129, 61290J (2006) https://doi.org/10.1117/12.646921

KEYWORDS: Absorption, Multilayers, Nanoparticles, Photonic crystals, Quantum dots, Refractive index, Dielectrics, Glasses, Plasma enhanced chemical vapor deposition, X-ray diffraction

Read Abstract +

Proceedings Article | 19 August 2005 Paper

Microspectroscopy and scanning microscopy in an optical tweezers system

Adriana Fontes, Antonio Neves, Wendel Moreira, Andre de Thomaz, Luis Barbosa, Patricia de Farias, Beate Santos, Ricardo Ferreira, Ana de Paula, Katsuhiro Ajito, Carlos Cesar

Proceedings Volume 5930, 593007 (2005) https://doi.org/10.1117/12.620754

KEYWORDS: Raman spectroscopy, Luminescence, Optical tweezers, Spectroscopy, Imaging spectroscopy, Quantum dots, Cadmium sulfide, Particles, Blood, Microscopes

Read Abstract +

Proceedings Article | 19 August 2005 Paper

Determination of fluid viscosity and femto Newton forces of Leishmania amazonensis using optical tweezers

Adriana Fontes, Selma Giorgio, Archimedes de Castro, Jr., Vivaldo Neto, Liliana de Y. Pozzo, Andre de Thomaz, Luiz Barbosa, Carlos Cesar

Proceedings Volume 5930, 593025 (2005) https://doi.org/10.1117/12.620745

KEYWORDS: Optical tweezers, Optical spheres, Geometrical optics, Calibration, Particles, Refractive index, Microfluidics, Microscopes, Objectives, Optical calibration

Read Abstract +

Proceedings Article | 18 August 2005 Paper

Force spectroscopy and two photon excited luminescence in an optical tweezers system

Adriana Fontes, Antonio Alvaro Ranha Neves, Wendel Lopes Moreira, Andre Alexandre de Thomaz, Luiz Carlos Barbosa, Ana Maria de Paula, Katsuhiro Ajito, Carlos Lenz Cesar

Proceedings Volume 5930, 59300C (2005) https://doi.org/10.1117/12.620744

KEYWORDS: Optical tweezers, Luminescence, Particles, Spectroscopy, Light scattering, Two photon excitation microscopy, Sapphire lasers, Nd:YAG lasers, Dielectric polarization, Mie scattering

Read Abstract +

Proceedings Article | 18 August 2005 Paper

Two photon absorption spectra in CdTe quantum dots

Lazaro Padilha, Jie Fu, David Hagan, Eric Van Stryland, Carlos Cesar, Luiz Barbosa, Carlos Cruz

Proceedings Volume 5931, 59310U (2005) https://doi.org/10.1117/12.617338

KEYWORDS: Absorption, Quantum dots, Semiconductors, Glasses, Borosilicate glass, Heat treatments, Visible radiation, Solids, Nonlinear optics, Femtosecond phenomena

Read Abstract +

Proceedings Article | 18 August 2005 Paper

Mechanical properties of stored red blood cells using optical tweezers

Adriana Fontes, Andre Alexandre de Thomaz, Liliana de Ysasa Pozzo, Maria de Lourdes Barjas-Castro, Marcelo Brandao, Sara Saad, Luiz Carlos Barbosa, Carlos Lenz Cesar

Proceedings Volume 5930, 59301Q (2005) https://doi.org/10.1117/12.620758

KEYWORDS: Blood, Optical tweezers, Plasma, Laser optics, Hematology, Surface plasmons, Microfluidics, Blood circulation, Microscopes, Optical testing

Read Abstract +

SPIE Journal Paper | 1 July 2005 Open Access

Investigation of red blood cell antigens with highly fluorescent and stable semiconductor quantum dots

Patricia Farias, Beate Santos, Frederico Menezes, Ricardo Ferreira, Maria Barjas-Castro, Vagner Castro, Paulo Lima, Adriana Fontes, Carlos Cesar

JBO, Vol. 10, Issue 04, 044023, (July 2005) https://doi.org/10.1117/12.10.1117/1.1993257

KEYWORDS: Blood, Luminescence, Quantum dots, Semiconductors, Confocal microscopy, Molecules, Cadmium, Cadmium sulfide, Natural surfaces, Microscopy

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 13 April 2005 Paper

Erbium doped tellurite photonic crystal optical fiber

Sergio Osorio, Enver Fernandez, Eugenio Rodriguez, Carlos Cesar, Luiz Barbosa

Proceedings Volume 5733, (2005) https://doi.org/10.1117/12.587904

KEYWORDS: Optical fibers, Glasses, Erbium, Photonic crystals, Capillaries, Photonic crystal fibers, Luminescence, Optical amplifiers, Argon ion lasers, Ions

Read Abstract +