Dr. Zhi Qiang (Leo) Li Profile

Dr. Zhi Qiang (Leo) Li

Vice President of Engineering at Crosslight Software Inc

SPIE Involvement:

Author | Instructor

Publications (22)

Proceedings Article | 8 November 2024 Paper

Application-based optimization of oxide-confined VCSEL

A. Nashed, Michel Lestrade, Z. Q. Li, Z. M. Simon Li

Proceedings Volume 13233, 132330D (2024) https://doi.org/10.1117/12.3034223

KEYWORDS: Oxides, Vertical cavity surface emitting lasers, Lithium, Quantum confinement, Design, Standing waves, Optical microcavities, Current confinement, Optical simulations, Diffraction

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Proceedings Article | 13 March 2024 Poster + Paper

Full vectorial analysis of PCVCSEL devices

A. Nashed, Michel Lestrade, Z. Li, Z. M. Simon Li

Proceedings Volume 12904, 129040M (2024) https://doi.org/10.1117/12.3000094

KEYWORDS: Vertical cavity surface emitting lasers, Optical simulations, 3D modeling, Photonic crystals, Optical microcavities

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Proceedings Article | 1 October 2023 Poster + Paper

2D modeling of perovskite/Si tandem solar cell

Yegao Xiao, Michel Lestrade, Zhiqiang Li, Zhanming Li

Proceedings Volume 12660, 126600C (2023) https://doi.org/10.1117/12.2680269

KEYWORDS: Modeling, Perovskite, Silicon, Tandem solar cells, Coating, Solar cells, Quantum simulation, Absorption, Geometrical optics, External quantum efficiency

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Proceedings Article | 15 March 2023 Presentation + Paper

Full vectorial analysis of surface relief VCSEL

A. Nashed, Michel Lestrade, Z. Q. Li, Z. M. Simon Li

Proceedings Volume 12439, 124390J (2023) https://doi.org/10.1117/12.2646895

KEYWORDS: Vertical cavity surface emitting lasers, Optical simulations, Optical microcavities, 3D modeling, Standing waves

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Proceedings Article | 9 October 2021 Poster + Paper

Modeling of high-speed uni-traveling carrier photodiodes

Y. G. Xiao, Z. Q. Li, Z. M. Simon Li

Proceedings Volume 11894, 118941L (2021) https://doi.org/10.1117/12.2601448

KEYWORDS: Photodiodes, Capacitance, Diodes, Indium gallium arsenide, Absorption, Telecommunications, Semiconductors, Quantum efficiency

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Proceedings Article | 20 August 2020 Poster + Paper

Modeling of InGaAs/AlGaAsSb APDs with high gain-bandwidth product

Yegao Xiao, Zhiqiang Li, Zhanming Li

Proceedings Volume 11498, 114980R (2020) https://doi.org/10.1117/12.2568197

KEYWORDS: Avalanche photodetectors, Absorption, Ionization, Electrons, Stochastic processes, Instrument modeling, Indium gallium arsenide, Device simulation, Computer aided design

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Proceedings Article | 6 November 2018 Paper

Rigorous full-vectorial optical analysis of VCSEL using FDFD method

A. Nashed, Z. Q. Li, Z. Simon Li , Michel Lestrade , Y. G. Xiao, Y. J. Zhou

Proceedings Volume 10812, 1081204 (2018) https://doi.org/10.1117/12.2500933

KEYWORDS: Vertical cavity surface emitting lasers, Finite element methods, Finite-difference time-domain method, Optical analysis, Lithium, Oxides, Resonators, Dielectrics, Magnetism, Polarization

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Proceedings Article | 5 November 2018 Paper

Modeling of waveguide AlInAs avalanche photodiodes for high-gain-bandwidth product

Yegao Xiao, Zhiqiang Li, Yang Sheng, Zhanming Li

Proceedings Volume 10814, 108140M (2018) https://doi.org/10.1117/12.2500929

KEYWORDS: Avalanche photodetectors, Waveguides, Absorption, Electrons, Ionization, Indium gallium arsenide, Avalanche photodiodes, Beam propagation method, Waveguide modes, Computer aided design

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Proceedings Article | 22 February 2017 Paper

Two-dimensional modeling of AlInAs avalanche photodiodes for high gain-bandwidth product

Yegao Xiao, Zhiqiang Li, Michel Lestrade, Zhanming Li

Proceedings Volume 10098, 1009825 (2017) https://doi.org/10.1117/12.2252565

KEYWORDS: Avalanche photodiodes, Systems modeling, Instrument modeling, Solid modeling, Computer aided design, Optics manufacturing, Optoelectronic devices, Optoelectronics, Telecommunications, Receivers, Avalanche photodetectors, Absorption, Ionization, Electrons, Indium gallium arsenide

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Proceedings Article | 4 March 2016 Paper

Toward designing back-illuminated CMOS image sensor based on 3D modeling

Y. G. Xiao, K. Uehara, Y. Fu, M. Lestrade, Z. Q. Li, Y. J. Zhou, Z. M. Li

Proceedings Volume 9742, 97420A (2016) https://doi.org/10.1117/12.2213549

KEYWORDS: 3D modeling, Quantum efficiency, Copper indium disulfide, Finite-difference time-domain method, Sensors, Optoelectronics, CMOS sensors, Image sensors, Optimization (mathematics), Photodiodes

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Proceedings Article | 13 March 2013 Paper

Comprehensive anaylsis of GaSb-based mid-infrared vertical-cavity surface-emitting lasers

Z. Li, Z. M. Simon Li

Proceedings Volume 8639, 863907 (2013) https://doi.org/10.1117/12.1000108

KEYWORDS: Vertical cavity surface emitting lasers, Quantum wells, Gallium antimonide, Absorption, Refractive index, Mid-IR, Dielectrics, Electrons, Thermal analysis, Physics

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Proceedings Article | 21 February 2012 Paper

Two-dimensional modeling of CdZnTe/Si based dual and triple junction solar cells

Y. Xiao, Z. Li, M. Lestrade, Z. M. Simon Li

Proceedings Volume 8256, 82560T (2012) https://doi.org/10.1117/12.906803

KEYWORDS: Solar cells, Silicon, Sun, External quantum efficiency, Germanium, Instrument modeling, Absorption, Thin film solar cells, Indium gallium phosphide, Finite-difference time-domain method

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Proceedings Article | 8 September 2010 Paper

Modeling study for developing CdZnTe(CdSe)/CIGS tandem solar cells

Y. Xiao, Z. Li, M. Lestrade, Z. M. Li

Proceedings Volume 7771, 77710K (2010) https://doi.org/10.1117/12.860958

KEYWORDS: Solar cells, Tandem solar cells, Transparent conductors, Copper indium gallium selenide, Absorption, Interfaces, Thin film solar cells, Molybdenum, Quantum efficiency, Solid modeling

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Proceedings Article | 21 August 2009 Paper

2D modeling of silicon based thin film dual and triple junction solar cells

Y. G. Xiao, K. Uehara, M. Lestrade, Z. Q. Li, Z. M. Li

Proceedings Volume 7409, 74090F (2009) https://doi.org/10.1117/12.826262

KEYWORDS: Solar cells, Finite-difference time-domain method, Thin film solar cells, Transparent conductors, Thin films, Silicon, Silicon films, External quantum efficiency, Absorption, Interfaces

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Proceedings Article | 9 September 2008 Paper

Modeling of GaInP/GaAs/Ge and the inverted-grown metamorphic GaInP/GaAs/GaInAs triple-junction solar cells

Y. G. Xiao, Z. Q. Li, Z. M. Li

Proceedings Volume 7043, 70430B (2008) https://doi.org/10.1117/12.795576

KEYWORDS: Solar cells, Gallium arsenide, Sun, Electrons, Indium gallium phosphide, Germanium, Doping, Instrument modeling, Absorption, Resistance

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Proceedings Article | 3 September 2008 Paper

Suppressing premature edge breakdown for InP/InGaAs avalanche photodiodes by modeling analyses

Y. Xiao, Z. Li, Z. M. Simon Li

Proceedings Volume 7055, 70550Y (2008) https://doi.org/10.1117/12.795549

KEYWORDS: Diffusion, Avalanche photodetectors, Absorption, Electrons, Ionization, Instrument modeling, Avalanche photodiodes, Solid modeling, Etching, Doping

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Proceedings Article | 3 October 2007 Paper

Modeling of Si-based solar cells with V-grooved surface texture by Crosslight APSYS

Y. G. Xiao, M. Lestrade, Z. Q. Li, Z. M. Li

Proceedings Volume 6651, 66510F (2007) https://doi.org/10.1117/12.732664

KEYWORDS: Solar cells, Silicon, Absorption, Semiconducting wafers, Electrons, Instrument modeling, Antireflective coatings, Doping, Coating, Diffusion

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Proceedings Article | 12 September 2007 Paper

Modeling of resonant cavity enhanced separate absorption charge and multiplication avalanche photodiodes by Crosslight APSYS

Y. Xiao, Z. Li, Z. M. Simon Li

Proceedings Volume 6660, 666014 (2007) https://doi.org/10.1117/12.732682

KEYWORDS: Avalanche photodetectors, Absorption, Electrons, Quantum efficiency, Ionization, Mirrors, Photodetectors, Avalanche photodiodes, Aluminum, Gallium

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Proceedings Article | 13 February 2007 Paper

Modeling of GaN based resonant-cavity light-emitting diode

Z. Simon Li, Z. Q. Li, Ray-Hua Horng

Proceedings Volume 6486, 64860S (2007) https://doi.org/10.1117/12.696651

KEYWORDS: Light emitting diodes, Gallium nitride, Quantum wells, Optical microcavities, Electroluminescence, Instrument modeling, Reflectivity, Mirrors, Lithium, Device simulation

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Proceedings Article | 8 September 2006 Paper

Modeling of multi-junction solar cells by Crosslight APSYS

Z. Li, Y. Xiao, Z. M. Simon Li

Proceedings Volume 6339, 633909 (2006) https://doi.org/10.1117/12.681258

KEYWORDS: Solar cells, Electrons, Gallium arsenide, Quantum efficiency, Instrument modeling, Data modeling, Germanium, Indium gallium phosphide, Multijunction solar cells, Data processing

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Proceedings Article | 7 September 2006 Paper

Modeling of avalanche photodiodes by Crosslight APSYS

Y. Xiao, Z. Li, Z. M. Simon Li

Proceedings Volume 6294, 62940Z (2006) https://doi.org/10.1117/12.681189

KEYWORDS: Avalanche photodetectors, Ionization, Electrons, Avalanche photodiodes, Absorption, Solid modeling, Instrument modeling, TCAD, Photodetectors, Performance modeling

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Proceedings Article | 28 February 2006 Paper

Analysis of surface-normal coupled-quantum-well modulator at 1.55 um

Z. Li, Alfred Lam, Z. Simon Li

Proceedings Volume 6115, 611508 (2006) https://doi.org/10.1117/12.646385

KEYWORDS: Modulators, Absorption, Electrons, Quantum wells, Analytical research, Physics, Lithium, Diodes, Modulation, Metalorganic chemical vapor deposition

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Showing 5 of 22 publications

Course Instructor

WS9001: Crosslight Software Inc. Industry Sponsored Workshop: Introduction to Optoelectronic Device Simulation and VCSEL Design

The course introduces design principles of modern optoelectronic devices such as vertical-cavity lasers and nitride light emitters. It includes hands-on exercises and provides basic skills for operating advanced simulation software. Deep insight into micro- and nano-scale physical processes is given using real-world device examples. Key material properties are discussed and strategies for obtaining realistic simulation results are described.

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