Prof. Nicolae C. Panoiu Profile

Prof. Nicolae C. Panoiu

Professor of Nanophotonics at Univ College London

SPIE Involvement:

Conference Program Committee | Author

Websites:

Personal Website

Publications (23)

Proceedings Article | 4 October 2023 Presentation

Nonlinear optical interactions in certain topological photonic systems

Nicolae Panoiu, Jitong Wang, Yupei Wang

Proceedings Volume PC12647, PC126471C (2023) https://doi.org/10.1117/12.2677161

KEYWORDS: Second harmonic generation, Photonics systems, Graphene, Waveguides, Silicon nitride, Photonic crystals, Optical transmission, Optical sensing, Nonlinear transmission, Molecules

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Proceedings Article | 14 March 2023 Poster + Paper

Giant second-harmonic generation in photonic crystal slabs possessing double-resonance bound states in the continuum

Ji Tong Wang, Fengxia Li, Nicolae Panoiu

Proceedings Volume 12405, 124050K (2023) https://doi.org/10.1117/12.2653320

KEYWORDS: Second harmonic generation, Photonic crystals, Diffraction, Silicon nitride, Physics, Terahertz radiation, Photonic nanostructures, Resonance enhancement, Reflection, Polarization

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Proceedings Article | 24 May 2022 Presentation + Paper

Optically controllable coupling between edge and topological waveguide modes of certain graphene metasurfaces

Yupei Wang, Nicolae Panoiu

Proceedings Volume 12130, 1213004 (2022) https://doi.org/10.1117/12.2621893

KEYWORDS: Graphene, Plasmonic waveguides, Waveguides, Terahertz radiation, Kerr effect, Waveguide modes, Dispersion, Wave propagation, Refractive index, Phase matching

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Proceedings Article | 6 October 2020 Presentation + Paper

Nonlinear optical interactions of topological modes of photonic nanostructures

Zhihao Lan, Jian Wei You, Nicolae Panoiu

Proceedings Volume 11461, 114610X (2020) https://doi.org/10.1117/12.2568438

KEYWORDS: Photonic nanostructures, Photonic crystals, Plasmonics, Crystals, Nonlinear crystals, Light-matter interactions, Solid state physics, Physics, Nonlinear optics, Third-harmonic generation

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Proceedings Article | 1 April 2020 Presentation + Paper

Topological valley plasmon transport in graphene bi-layer metasurfaces: applications to sensing nanodevices

Yupei Wang, Jian Wei You, Zhihao Lan, Nicolae Panoiu

Proceedings Volume 11344, 113441E (2020) https://doi.org/10.1117/12.2555724

KEYWORDS: Graphene, Interfaces, Sensors, Terahertz radiation, Molecules, Plasmonics, Photonics, Plasmons, Nitrogen dioxide

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Proceedings Article | 31 December 2019 Paper

Frequency mixing in nonlinear interaction of one-way edge-modes of topological photonic crystals

Zhihao Lan, Jian Wei You, Nicolae Panoiu

Proceedings Volume 11201, 1120108 (2019) https://doi.org/10.1117/12.2539874

KEYWORDS: Second-harmonic generation, Photonic crystals, Magnetism, Third-harmonic generation, Harmonic generation, Dispersion

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Proceedings Article | 5 September 2019 Paper

Pulsed dynamics in a system of coupled silicon photonic crystal cavity-waveguide nanostructures

Victor Manuel Fernandez Laguna, Qun Ren, Nicolae Panoiu

Proceedings Volume 11081, 110812D (2019) https://doi.org/10.1117/12.2526658

KEYWORDS: Ultrahigh q cavity, Waveguides, Picosecond phenomena, Wave propagation, Photonic crystals, Waveguide modes, Silicon photonics, Silicon, Mathematical modeling, Nanostructures

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Proceedings Article | 24 August 2017 Presentation + Paper

Enhanced optical nonlinearities in 2D-3D heteromaterials

Jian Wei You, Nicolae Panoiu

Proceedings Volume 10345, 1034512 (2017) https://doi.org/10.1117/12.2273123

KEYWORDS: Nonlinear optics, Nanostructures, Second-harmonic generation, Third-harmonic generation, Photonic devices, Photonic nanostructures, Waveguide modes, Graphene, Nanomaterials, Frequency conversion

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Proceedings Article | 28 April 2017 Presentation

Accurate Performance Evaluation of Single-channel Silicon Optical Interconnects Operating in the Pulsed Regime (Conference Presentation)

Jie You, Nicolae Coriolan Panoiu

Proceedings Volume 10108, 101080I (2017) https://doi.org/10.1117/12.2251886

KEYWORDS: Telecommunications, Optical communications, Computing systems, Photonic integrated circuits, Silicon, Waveguides, Optical interconnects, Silicon photonics, Nonlinear optics, Integrated optics

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Proceedings Article | 16 September 2016 Presentation + Paper

Nonlinear plasmonic resonances in graphene nanostructures

Jian Wei You, Martin Weismann, Nicolae C. Panoiu

Proceedings Volume 9920, 99200P (2016) https://doi.org/10.1117/12.2237944

KEYWORDS: Nonlinear optics, Graphene, Diffraction gratings, Plasmons, Absorption, Photonics, Plasmonics, Optical properties, Polarization, Resonance enhancement

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Proceedings Article | 13 May 2016 Presentation + Paper

Calculation of BER in multi-channel silicon optical interconnects: comparative analysis of strip and photonic crystal waveguides

Jie You, Spyros Lavdas, Nicolae C. Panoiu

Proceedings Volume 9891, 989116 (2016) https://doi.org/10.1117/12.2223187

KEYWORDS: Silicon, Waveguides, Silicon photonics, Optical interconnects, Optical networks, Photonic crystals, Wave propagation, Photonics systems, Signal detection, Modeling, Signal to noise ratio, Channel projecting optics, Receivers

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Proceedings Article | 5 October 2015 Presentation

A comparative study of second-harmonic generation in plasmonic and dielectric gratings made of centrosymmetric materials (Presentation Recording)

Martin Weismann, Dominic F. Gallagher, Nicolae-Coriolan Panoiu

Proceedings Volume 9547, 95470R (2015) https://doi.org/10.1117/12.2187553

KEYWORDS: Second-harmonic generation, Numerical analysis, Global system for mobile communications, Dielectric polarization, Nonlinear optics, Dielectrics, Plasmonics, Diffraction gratings, Materials processing, Diffraction

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We present a new numerical method for the analysis of second-harmonic generation (SHG) in one- and two-dimensional (1D, 2D) diffraction gratings containing centrosymmetric quadratically nonlinear materials. Thus, the nonlinear optical properties of a material are determined by its symmetry properties: non-centrosymmetric materials lack inversion symmetry and therefore allow local even-order SHG in the bulk of the material, whereas this process is forbidden in centrosymmetric materials. The inversion symmetry of centrosymmetric materials is broken at their surface whence they allow local surface SHG. Additionally, centrosymmetric materials give rise to nonlocal (bulk) SHG. Our numerical method extends the linear generalized source method (GSM), which is an efficient numerical method for solving the problem of linear diffraction in periodic structures of arbitrary geometry. The nonlinear GSM is a three-step algorithm: for a given excitation at the fundamental frequency the linear field is computed using the linear GSM. This field gives rise to a nonlinear source polarization at the second harmonic (SH) frequency. This nonlinear polarization comprises surface and bulk polarizations as additional source terms and is subsequently used to compute the nonlinear near- and far-field optical response at the SH. We study the convergence characteristics of the nonlinear GSM for 1D and 2D periodic structures and emphasize the numerical intricacies caused by the surface SH polarization term specific to centrosymmetric materials. In order to illustrate the practical significance of our numerical method, we apply it to metallic gratings made of Au and Ag as well as dielectric grating structures made of silicon and investigate the relative contribution of the bulk and surface nonlinearity to the nonlinear optical response at the SH. Particular attention is paid to optical effects that have a competing influence to the nonlinear optical response of the grating structures, namely the resonant local field enhancement and optical losses.

Proceedings Article | 2 September 2015 Paper

Designer metal-nanoantennae/dye complexes for maximum fluorescence enhancement

Xiang Meng, Hao Yang, Richard Grote, Jerry Dadap, Nicolae Panoiu, Richard Osgood

Proceedings Volume 9547, 95473B (2015) https://doi.org/10.1117/12.2188382

KEYWORDS: Luminescence, Molecules, Antennas, Metals, Nanoparticles, Finite-difference time-domain method, Spherical lenses, Gold, Electroluminescent displays, Optical spheres

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Proceedings Article | 31 August 2015 Presentation + Paper

Optical pulse engineering and processing using optical nonlinearities of nanostructured waveguides made of silicon

Spyros Lavdas, Jie You, Richard Osgood, Nicolae C. Panoiu

Proceedings Volume 9546, 95461Z (2015) https://doi.org/10.1117/12.2190170

KEYWORDS: Waveguides, Silicon, Dispersion, Silicon photonics, Photonic crystals, Nonlinear optics, Wave propagation, Fluorescence correlation spectroscopy, Geometrical optics, Nanowires

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Proceedings Article | 1 May 2014 Paper

Quasi-phase-matched four-wave-mixing of optical pulses in periodically modulated silicon photonic wires

Spyros Lavdas, Jeffrey Driscoll, Richard Grote, Richard Osgood, Nicolae Panoiu

Proceedings Volume 9133, 91330L (2014) https://doi.org/10.1117/12.2052249

KEYWORDS: Waveguides, Dispersion, Wave propagation, Modulation, Silicon, Silicon photonics, Nonlinear optics, Signal processing, Photons, Numerical simulations

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Proceedings Article | 1 May 2014 Paper

Generalized source method for modeling nonlinear diffraction in planar periodic structures

Martin Weismann, Dominic F. Gallagher, Nicolae Panoiu

Proceedings Volume 9131, 913115 (2014) https://doi.org/10.1117/12.2052247

KEYWORDS: Diffraction gratings, Global system for mobile communications, Waveguides, Polarization, Second-harmonic generation, Nonlinear optics, Diffraction, Optical design, Waveguide modes, Gallium arsenide

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Proceedings Article | 26 September 2013 Paper

Generation and collision of optical similaritons in dispersion-engineered silicon photonic nanowires

Spyros Lavdas, Jeffrey Driscoll, Richard Grote, Richard Osgood, Nicolae Panoiu

Proceedings Volume 8816, 88160J (2013) https://doi.org/10.1117/12.2023728

KEYWORDS: Dispersion, Waveguides, Wave propagation, Mid-IR, Fluorescence correlation spectroscopy, Silicon photonics, Silicon, Absorption, Nonlinear optics, Solitons

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Proceedings Article | 1 May 2012 Paper

Robustness of the scanning second harmonic generation microscopy technique for characterization of hotspot patterns in plasmonic nanomaterials

V. Valev, B. De Clercq, X. Zheng, C. Biris, N. Panoiu, A. Silhanek, V. Volskiy, O. Aktsipetrov, G. A. Vandenbosch, M. Ameloot, V. Moshchalkov, T. Verbiest

Proceedings Volume 8424, 842411 (2012) https://doi.org/10.1117/12.922880

KEYWORDS: Second-harmonic generation, Objectives, Nanostructures, Microscopy, Harmonic generation, Plasmonics, Nanomaterials, Gold, Microscopes, Photomicroscopy

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Proceedings Article | 7 February 2012 Paper

Nonlinear modes of plasmonic microcavities: theoretical analysis and device applications

Nicolae Panoiu, Claudiu Biris

Proceedings Volume 8236, 823615 (2012) https://doi.org/10.1117/12.907369

KEYWORDS: Plasmonics, Absorption, Plasmons, Plasmonic sensors, Sensors, Near field optics, Signal to noise ratio, Optical microcavities, Electromagnetism, Nanowires

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Proceedings Article | 12 April 2001 Paper

Influence of the interchannel frequency separation on the transmission capacity of a soliton-based WDM system

Nicolae-Coriolan Panoiu, Dumitru Mihalache, Christoph Etrich, Falk Lederer

Proceedings Volume 4271, (2001) https://doi.org/10.1117/12.424715

KEYWORDS: Solitons, Wavelength division multiplexing, Chromium, Superposition, Optical fibers, Physics, Channel projecting optics, Dispersion, Phase shifts, Atomic, molecular, and optical physics

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Proceedings Article | 2 July 1998 Paper

Novel femtosecond optical solitons in weakly excited semiconductors

Dumitru Mihalache, Igor Mel'nikov, Nicolae-Coriolan Panoiu

Proceedings Volume 3405, (1998) https://doi.org/10.1117/12.312775

KEYWORDS: Semiconductors, Solitons, Excitons, Femtosecond phenomena, Polarization, Radio propagation, Optical solitons, Physics, Wave propagation, Nonlinear optics

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SPIE Journal Paper | 1 June 1996

Timing jitter of femtosecond solitons in monomode optical fibers

Dumitru Mihalache, Lucian-Cornel Crasovan, Nicolae-Coriolan Panoiu, Florin Moldoveanu, Daniel-Marian Baboiu

OE, Vol. 35, Issue 06, (June 1996) https://doi.org/10.1117/12.10.1117/1.600728

KEYWORDS: Solitons, Femtosecond phenomena, Picosecond phenomena, Raman scattering, Single mode fibers, Optical fibers, Optical amplifiers, Dispersion, Telecommunications, Amplifiers

Proceedings Article | 8 March 1995 Paper

Evolution of bright-femtosecond solitons under the Raman perturbation

Dumitru Mihalache, Nicolae-Coriolan Panoiu, Florin Moldoveanu, Dumitru Mazilu, Daniel-Marian Baboiu

Proceedings Volume 2461, (1995) https://doi.org/10.1117/12.203544

KEYWORDS: Solitons, Raman spectroscopy, Raman scattering, Femtosecond phenomena, Single mode fibers, Chlorine, Wave propagation, Complex systems, Ultrafast phenomena, Optical fibers

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