Prof. Ann Roberts Profile

Prof. Ann Roberts

Professor at Univ of Melbourne

SPIE Involvement:

Fellows Committee | Author | Student Chapter Advisor

Publications (32)

Proceedings Article | 8 June 2024 Presentation

Presentation

Innovations in all-optical image processing: the promise of meta-optics

Lukas Wesemann, Shaban Sulejman, Niken Priscilla, Lincoln Clark, Haiwei Wang, Iryna Khodasevych, Krishna Nair, Md. Ataur Rahman, Timothy Davis, Michele Cotrufo, Andrea Alù, Francesca Iacopi, Madhu Bhaskaran, Ann Roberts

Proceedings Volume PC13030, PC130300B (2024) https://doi.org/10.1117/12.3012563

KEYWORDS: Image processing, Thin films, Signal processing, Remote sensing, 2D materials, Wavefronts, Visualization, Visible radiation, Tunable filters, Sensing systems

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Proceedings Article | 8 March 2024 Presentation + Paper

Presentation + Paper

High resolution bio-imaging via inverse design of metasurfaces

Niken Priscilla, Neuton Li, Lukas Wesemann, Shaban Sulejman, Jiajun Meng, Rajour Tanyi Ako, Madhu Bhaskaran, Andrey Sukhorukov, Ann Roberts

Proceedings Volume 12895, 128950P (2024) https://doi.org/10.1117/12.3000841

KEYWORDS: Spatial frequencies, Modulation transfer functions, Design, Phase imaging, Image processing, Optical transfer functions, Spatial light modulators, Imaging systems, Cameras

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Proceedings Article | 12 August 2023 Presentation

Presentation

Meta-optics for new approaches to all-optical image processing

Lukas Wesemann, Shaban Sulejman, Niken Priscilla, Wendy Lee, Lincoln Clark, Jon Rickett, Jingchao Song, Jieqiong Lou, Elizabeth Hinde, Timothy Davis, Ann Roberts

Proceedings Volume PC12622, PC126220B (2023) https://doi.org/10.1117/12.2678073

KEYWORDS: Image processing, Geometrical optics, Signal processing, Imaging systems, 2D materials, Wavefronts, Wavefront sensors, Visualization, Thin films, Polarization

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Proceedings Article | 17 March 2023 Presentation

Presentation

Nano-photonics for compact all-optical image processing with asymmetric transfer functions

Ann Roberts

Proceedings Volume PC12430, PC1243011 (2023) https://doi.org/10.1117/12.2646742

KEYWORDS: Nanophotonics, Image processing, Image filtering, Data storage, Waveguides, Unmanned vehicles, Surgery, Remote sensing, Real time image processing, Plasmonics

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Proceedings Article | 13 October 2022 Presentation

Presentation

Plasmonic solutions for all-optical, real-time image processing and phase contrast imaging

Ann Roberts

Proceedings Volume PC12197, PC1219706 (2022) https://doi.org/10.1117/12.2632867

KEYWORDS: Plasmonics, Real time image processing, Phase contrast, Imaging systems, Adaptive optics, Waveguides, Visualization, Spatial filters, Optical imaging, Optical components

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Proceedings Article | 5 March 2022 Presentation

Presentation

Meta-optics for object plane Fourier image processing

Ann Roberts

Proceedings Volume PC12009, PC120090Y (2022) https://doi.org/10.1117/12.2605417

KEYWORDS: Image processing, Image transmission, Image filtering, Image enhancement, Waveguides, Visualization, Remote sensing, Real time image processing, Plasmonics, Phase contrast

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Proceedings Article | 20 August 2020 Presentation

Presentation

Nanophotonic systems for ultracompact, all-optical approaches to image processing

Ann Roberts

Proceedings Volume 11462, 1146207 (2020) https://doi.org/10.1117/12.2567551

KEYWORDS: Nanophotonics, Image processing, Data acquisition, Control systems, Image filtering, Optical sensors, Electronic components, Imaging systems, Optical microscopy, Remote sensing

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Proceedings Article | 31 December 2019 Paper

Paper

Scalable and consistent fabrication of plasmonic colors via nanoimprint lithography

M. Faris Shanin Shahidan, Jingchao Song, Timothy James, Paul Mulvaney, Ann Roberts

Proceedings Volume 11201, 112011J (2019) https://doi.org/10.1117/12.2539079

KEYWORDS: Nanoimprint lithography, Plasmonics, Electron beam lithography, Nanorods, Nanostructures, Printing, Nanoantennas, Nanolithography

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Proceedings Article | 31 December 2019 Paper

Paper

Plasmonic metasurfaces for optical information processing

L. Wesemann, E. Panchenko, K. Singh, D. Gomez, T. Davis, A. Roberts

Proceedings Volume 11201, 112010F (2019) https://doi.org/10.1117/12.2539751

KEYWORDS: Plasmonics, Image enhancement, Spatial frequencies, Spatial filters, Optical signal processing, Image processing, Phase shift keying, Optical filters, Image filtering, Scanning electron microscopy

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Proceedings Article | 30 December 2019 Paper

Paper

Tuning the asymmetric response of metasurfaces for optical spatial filtering

Timothy Davis, Fatima Eftekhari, Daniel Gómez, Ann Roberts

Proceedings Volume 11200, 1120008 (2019) https://doi.org/10.1117/12.2539797

KEYWORDS: Spatial filters, Image processing, Optical transfer functions, Plasmonics, Spatial frequencies, Nanofabrication, Thin films

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Proceedings Article | 16 February 2017 Presentation + Paper

Presentation + Paper

Plasmonics-enabled metal-semiconductor-metal photodiodes for high-speed interconnects and polarization sensitive detectors

Evgeniy Panchenko, Jasper Cadusch, Timothy James, Ann Roberts

Proceedings Volume 10106, 1010619 (2017) https://doi.org/10.1117/12.2250728

KEYWORDS: Nanoantennas, Photodetectors, Polarization, Photonics, Photodiodes, Sensors, Surface plasmons, Optical instrument design, Diodes, Plasmonics, Silicon, Signal to noise ratio

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SPIE Journal Paper | 29 March 2016

Modified stripe waveguide design for plasmonic input port structures

Evgeniy Panchenko, Timothy James, Ann Roberts

JNP, Vol. 10, Issue 01, 016019, (March 2016) https://doi.org/10.1117/12.10.1117/1.JNP.10.016019

KEYWORDS: Integrated circuits, Waveguides, Wave propagation, Plasmonics, Surface plasmons, Silver, Silicon, Signal attenuation, Waveguide modes, Integrated circuit design

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Proceedings Article | 14 March 2016 Paper

Paper

Nanometers to centimeters: novel optical nano-antennas, with an eye to scaled production

Timothy James, Jasper Cadusch, Stuart Earl, Evgeniy Panchenko, Paul Mulvaney, Timothy Davis, Ann Roberts

Proceedings Volume 9756, 97560Z (2016) https://doi.org/10.1117/12.2210769

KEYWORDS: Plasmonics, Antennas, Optical components, Lithography, Electromagnetic radiation, Photonics, Light sources, Nanoimprint lithography, Electron beam lithography, Silver, Scanning electron microscopy, Polymers, Polarization, Nanofabrication

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Proceedings Article | 22 December 2015 Paper

Paper

Transforming polarisation to wavelength via two-colour quantum dot plasmonic enhancement

Timothy James, Paul Mulvaney, Timothy Davis, Ann Roberts

Proceedings Volume 9668, 966857 (2015) https://doi.org/10.1117/12.2199045

KEYWORDS: Antennas, Near field optics, Polarization, Plasmonics, Photonics, Aluminum, Quantum dots, Semiconductors, Electromagnetic radiation, Reflectivity, Thin films, Light sources

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SPIE Journal Paper | 5 December 2014

Investigation of erbium dopant distribution in silica optical fibers with fluorescence-based measurements using a near-field scanning microscope

Fotios Sidiroglou, Ann Roberts, Greg Baxter

OE, Vol. 53, Issue 12, 126104, (December 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.12.126104

KEYWORDS: Near field scanning optical microscopy, Ions, Erbium, Optical fibers, Luminescence, Silica, Optical filters, Near field optics, Optical amplifiers, Spatial resolution

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Proceedings Article | 17 August 2014 Paper

Paper

Polarization manipulation with subwavelength nanoapertures

Jasper Cadusch, Timothy James, Amir Djalalian-Assl, Timothy Davis, Ann Roberts

Proceedings Volume 9163, 916321 (2014) https://doi.org/10.1117/12.2060906

KEYWORDS: Polarization, Plasmonics, Wave plates, Silver, Neodymium, Telecommunications, Remote sensing, Optical filters, Surface plasmons, Finite element methods

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Proceedings Article | 7 December 2013 Paper

Paper

Vanadium dioxide thickness effects on tunable optical antennas

Stuart Earl, Timothy James, Robert Marvel, Daniel Gomez, Timothy Davis, Jason Valentine, Jeffrey McCallum, Richard Haglund, Ann Roberts

Proceedings Volume 8923, 89232S (2013) https://doi.org/10.1117/12.2033739

KEYWORDS: Plasmonics, Optical antennas, Antennas, Silicon, Vanadium, Silver, Optical arrays, Absorption, Scanning electron microscopy, Ellipsometry

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Proceedings Article | 7 December 2013 Paper

Paper

Polarization effect and emission control in asymmetric cross-shaped slot antennas surrounded with periodic corrugations

A. Djalalian-Assl, J. Cadusch, T. James, T. Davis, A. Roberts

Proceedings Volume 8923, 892312 (2013) https://doi.org/10.1117/12.2033782

KEYWORDS: Polarization, Spiral phase plates, Silver, Glasses, Interfaces, Antennas, Dielectric polarization, Objectives, Plasmonics, Image transmission

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Proceedings Article | 31 January 2012 Paper

Paper

Periodic array of nanoholes on gold-coated optical fiber end-faces for surface plasmon resonance liquid refractive index sensing

Huy Nguyen, Fotios Sidiroglou, Stephen Collins, Gregory Baxter, Ann Roberts, Timothy Davis

Proceedings Volume 8351, 835128 (2012) https://doi.org/10.1117/12.915938

KEYWORDS: Optical fibers, Refractive index, Surface plasmons, Sensors, Gold, Liquids, Reflection, Reflectivity, Finite-difference time-domain method, Metals

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Proceedings Article | 3 September 2009 Paper

Paper

Spatially varying near-resonant aperture arrays for beam manipulation

X. M. Goh, L. Lin, A. Roberts

Proceedings Volume 7394, 739427 (2009) https://doi.org/10.1117/12.824539

KEYWORDS: Phase shifts, Finite element methods, Silver, Phase modulation, Optical properties, Instrument modeling, Modulation, Optical simulations, Dielectric polarization, Performance modeling

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Proceedings Article | 12 February 2008 Paper

Paper

Three-dimensional quantitative phase imaging: current and future perspectives

Nicoleta Dragomir, Xiao Ming Goh, Ann Roberts

Proceedings Volume 6861, 686106 (2008) https://doi.org/10.1117/12.762619

KEYWORDS: Tomography, 3D image processing, Refractive index, Fiber Bragg gratings, Cladding, Capillaries, Microfluidics, Spatial resolution, Phase imaging, 3D metrology

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Proceedings Article | 8 January 2008 Paper

Paper

Plasmonic nanoresonant materials

Shannon Orbons, Marko Milicevic, Claire Rollinson, Brant Gibson, Shane Huntington, David Jamieson, Barry Luther-Davies, Darren Freeman, Michael Haftel, Carl Schlockermann, Tim Davis, Ann Roberts

Proceedings Volume 6801, 68010I (2008) https://doi.org/10.1117/12.772641

KEYWORDS: Metals, Optical properties, Finite element methods, Finite-difference time-domain method, Plasmonics, Waveguides, Surface plasmons, Silver, Resonance enhancement, Physics

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Proceedings Article | 25 September 2007 Paper

Paper

Modeling of classical ghost images formed using pseudo-thermal light sources

S. Crosby, S. Castelletto, A. Roberts, R. Scholten

Proceedings Volume 6710, 671002 (2007) https://doi.org/10.1117/12.732246

KEYWORDS: Scattering, Optical spheres, Sensors, Photons, Laser scattering, Coherence (optics), Image resolution, Mie scattering, Visibility, Image restoration

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Proceedings Article | 30 August 2006 Paper

Paper

Optical properties of nanoscale annular array metamaterials

S. Orbons, D. Freeman, B. Gibson, S. Huntington, B. Luther-Davies, D. Jamieson, A. Roberts

Proceedings Volume 6323, 63231W (2006) https://doi.org/10.1117/12.679210

KEYWORDS: Near field scanning optical microscopy, Silver, Near field, Electromagnetism, Metamaterials, Optical properties, Glasses, Ion beam lithography, Finite-difference time-domain method, Diffraction

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Proceedings Article | 8 July 2003 Paper

Paper

Nondestructive imaging and characterization of optical fiber Bragg gratings

Nicoleta Dragomir, Darol Garchev, Gregory Baxter, Peter Farrell, Ann Roberts

Proceedings Volume 5036, (2003) https://doi.org/10.1117/12.498355

KEYWORDS: Fiber Bragg gratings, Refractive index, Optical fibers, Digital image correlation, Nondestructive evaluation, Image processing, Ultraviolet radiation, Imaging systems, Microscopes, Fabrication

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SPIE Journal Paper | 1 July 2003

Complete characterization of a high-numerical-aperture small-core fiber with subwavelength resolution using atomic force microscopy and near-field scanning optical microscopy

Shane Huntington, Ann Roberts, Keith Nugent, Simon Fleming

OE, Vol. 42, Issue 07, (July 2003) https://doi.org/10.1117/12.10.1117/1.1576221

KEYWORDS: Near field scanning optical microscopy, Etching, Structured optical fibers, Refractive index, Atomic force microscopy, Solids, Optical fibers, Spatial resolution, Scanning probe microscopy, Photonics

Proceedings Article | 13 October 1998 Paper

Paper

Near-field probe interaction with an optical fiber taper

Peter Moar, Shane Huntington, Laurence Cahill, Jim Katsifolis, Ann Roberts, Keith Nugent, John Love

Proceedings Volume 3467, (1998) https://doi.org/10.1117/12.326809

KEYWORDS: Near field scanning optical microscopy, Near field, Refractive index, Optical fibers, Near field optics, Microscopes, Liquids, Wave propagation, Coating, Tapered optical fibers

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Proceedings Article | 10 January 1996 Paper

Paper

Fabrication of buried channel waveguides in fused silica by focused MeV ion-beam irradiation

Ann Roberts, M. von Bibra, Shane Huntington, Keith Nugent

Proceedings Volume 2695, (1996) https://doi.org/10.1117/12.229968

KEYWORDS: Waveguides, Silica, Refractive index, Near field, Ions, Raman spectroscopy, Ion beams, Fabrication, Hydrogen, Channel waveguides

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Proceedings Article | 6 September 1995 Paper

Paper

Investigation of optical fields using near-field optical techniques

A. Horsfall, Ann Roberts, Keith Nugent, Michael Hrynevych, Shane Huntington, S. Rhodes, M. von Bibra

Proceedings Volume 2535, (1995) https://doi.org/10.1117/12.218699

KEYWORDS: Near field, Prisms, Near field optics, Near field scanning optical microscopy, Electromagnetism, Reflection, Optical microscopy, Dielectrics, Magnetism, Microscopy

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Proceedings Article | 13 January 1993 Paper

Paper

Wavefront reconstruction from three-dimensional intensity measurements

Keith Nugent, Ann Roberts

Proceedings Volume 1741, (1993) https://doi.org/10.1117/12.138737

KEYWORDS: Fourier transforms, X-ray microscopy, Gaussian beams, Computer simulations, Interferometry, Wave propagation, Wavefront reconstruction, Holography, Spatial resolution, Point spread functions

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Proceedings Article | 1 February 1992 Paper

Paper

Imaging of near-field diffraction patterns with subwavelength resolution in the optical region

Duncan Butler, Keith Nugent, Ann Roberts, Patrick Kearney

Proceedings Volume 1556, (1992) https://doi.org/10.1117/12.134884

KEYWORDS: Near field scanning optical microscopy, Near field, Diffraction, Microscopy, Near field optics, Optical fibers, Image resolution, Sensors, Cladding, Near field diffraction

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Proceedings Article | 1 February 1992 Paper

Paper

Field detection by subwavelength aperture probes

Ann Roberts

Proceedings Volume 1556, (1992) https://doi.org/10.1117/12.134883

KEYWORDS: Waveguides, Magnetism, Wave propagation, Radio propagation, Microscopy, Electromagnetic radiation, Near field, Diffraction, Waveguide modes, Bessel functions

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Showing 5 of 32 publications

Conference Committee Involvement (2)

SPIE BioPhotonics Australasia

18 October 2016 | Adelaide, Australia

19th International Conference on Optical Fibre Sensors

14 April 2008 | Perth, Australia

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