Prof. Zhiwen Liu Profile

Prof. Zhiwen Liu

Professor at Pennsylvania State Univ

SPIE Involvement:

Conference Chair | Editor | Author | Student Chapter Advisor

Publications (52)

Proceedings Article | 3 October 2024 Presentation

Liquid-crystal-based reconfigurable structural nonlinearity

Tsung-Hsien Lin, Zhiwen Liu, Xingjie Ni, Iam-Choon Khoo

Proceedings Volume PC13113, PC131130O (2024) https://doi.org/10.1117/12.3026919

KEYWORDS: Liquid crystals, Spatial light modulators, Laser scattering, Structural materials, Speckle pattern, Spatial resolution, Scattering, Reliability, Photonic crystals, Phase distribution

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Proceedings Article | 3 October 2024 Presentation

Ultrafast imaging enabled by spatiotemporal encoding

Tunan Xia, Lidan Zhang, Chen Zhou, Cheng-Yu Wang, Yao Duan, Xingwang Zhang, Xingjie Ni, Zhiwen Liu

Proceedings Volume 13139, 1313906 (2024) https://doi.org/10.1117/12.3028673

KEYWORDS: Ultrafast imaging, Ultrafast phenomena, Optical imaging, Imaging systems, Deep learning, Cameras

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Proceedings Article | 3 October 2024 Presentation

Nonlocal PL dynamics near a monolayer/bilayer transition in WS2

Landon Hernandez, Jinkai Yang, Da Zhou, Mauricio Terrones, Zhiwen Liu, Hans Hallen

Proceedings Volume 13139, 131390L (2024) https://doi.org/10.1117/12.3028259

KEYWORDS: Excitons, Raman spectroscopy, Quantitative analysis, Monolayers, Microscopy, Fluorescence, Atomic force microscopy, 2D materials

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Proceedings Article | 3 October 2024 Presentation

Custom deep learning enables ultrafast pulse reconstruction using Fourier transformed collinear frequency resolved optical gating

Hans Hallen, Josh Noble, Chen Zhou, Bill Murray, Zhiwen Liu

Proceedings Volume 13139, 131390U (2024) https://doi.org/10.1117/12.3028511

KEYWORDS: Ultrafast phenomena, Deep learning, Laser frequency, Education and training, Data acquisition, Physics, Optical interferometry, Modeling, Laser interferometry, Fourier transforms

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Proceedings Article | 30 September 2024 Presentation

Photonic computing using reconfigurable liquid crystal based scattering media

Tunan Xia, Cheng-Kuan Wu, Tsung-Hsien Lin, Xingjie Ni, Iam-Choon Khoo, Zhiwen Liu

Proceedings Volume PC13121, PC1312109 (2024) https://doi.org/10.1117/12.3028859

KEYWORDS: Scattering media, Liquid crystals, Optical computing, Photonic crystals, Nonlinear crystals, Multiple scattering, Mirrors, Liquids, Design, Crystals

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Proceedings Article | 6 October 2023 Presentation

Multi-dimensional snapshot imaging with encoding metasurfaces

Xingjie Ni, Lidan Zhang, Chen Zhou, Yimin Ding, Hyun-Ju Ahn, Shengyuan Chang, Yao Duan, Xi Chen, Md Tarek Rahman, Tunan Xia, Cheng-Yu Wang, Zhiwen Liu

Proceedings Volume PC12681, PC1268107 (2023) https://doi.org/10.1117/12.2681472

KEYWORDS: Cameras, Polarization, Nanostructures, Image retrieval

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Proceedings Article | 6 October 2023 Poster

Ultrafast imaging using spatiotemporal encoding and deep learning

Chen Zhou, Lidan Zhang, Tunan Xia, Cheng-Yu Wang, Xingjie Ni, Zhiwen Liu

Proceedings Volume PC12681, PC126810G (2023) https://doi.org/10.1117/12.2679921

KEYWORDS: Ultrafast imaging, Deep learning, Ultrafast phenomena, Ultrafast measurement systems, Device simulation, Tolerancing, Imaging systems, Fabrication, Education and training, Cameras

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Proceedings Article | 3 October 2022 Presentation

Raman spectroscopy and imaging enhanced by hybrid optoplasmonic resonance

Wenbo Mao, Yihang Li, Zhiwen Liu, Lan Yang

Proceedings Volume PC12228, PC122280A (2022) https://doi.org/10.1117/12.2646631

KEYWORDS: Raman spectroscopy, Imaging spectroscopy, Surface enhanced Raman spectroscopy, Resonance enhancement, Spectroscopy, Sensors, Raman scattering, Proteins, Plasmonics, Optical sensors

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Proceedings Article | 3 October 2022 Presentation

Divided pulse soliton self-frequency shift source for nonlinear imaging and spectroscopy

Landon Hernandez, Atriya Ghosh, Victor Bucklew, Cheng-Yu Wang, Chen Zhou, Zhiwen Liu

Proceedings Volume PC12228, PC122280H (2022) https://doi.org/10.1117/12.2637017

KEYWORDS: Imaging spectroscopy, Spectroscopy, Solitons, Ultrafast phenomena, Ultrafast lasers, Ultrafast imaging, Solid state lasers, Solid state electronics, Raman spectroscopy, Optical spectroscopy imaging

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Proceedings Article | 3 October 2022 Presentation

Space-time encoding metasurface-enabled compressive ultrahigh-speed imaging

Xingjie Ni, Yao Duan, Xingwang Zhang, Cheng-Yu Wang, Zhiwen Liu

Proceedings Volume PC12228, PC122280N (2022) https://doi.org/10.1117/12.2636430

KEYWORDS: Computer programming, Ultrafast phenomena, Ultrafast imaging, Singular optics, Reconstruction algorithms, Modulation, Imaging systems, Femtosecond phenomena, Compressed sensing, Cameras

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Proceedings Article | 3 October 2022 Presentation

Nonlocal exciton dynamics in monolayer WS_2

Hans Hallen, Landon Hernandez, Da Zhou, Mauricio Terrones, Zhiwen Liu

Proceedings Volume PC12228, PC1222803 (2022) https://doi.org/10.1117/12.2635671

KEYWORDS: Excitons, Spectroscopy, Quantitative analysis, Prisms, Charge-coupled devices

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Proceedings Article | 1 August 2021 Presentation

Fluorescence nonlocality in two-dimensional Materials

Hans Hallen, Landon Hernandez, William Murray, Zhiwen Liu

Proceedings Volume 11825, 118250W (2021) https://doi.org/10.1117/12.2595933

KEYWORDS: Luminescence, Near field scanning optical microscopy, Transition metals, Signal generators, Signal detection, Second-harmonic generation, Near field, Mode locking, Harmonic generation, Femtosecond phenomena

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Proceedings Article | 1 August 2021 Presentation

Development of a divided pulse soliton self frequency shift source for multiline nonlinear imaging

Atriya Ghosh, Victor Bucklew, Zhiwen Liu

Proceedings Volume 11825, 118250R (2021) https://doi.org/10.1117/12.2597289

KEYWORDS: Solitons, Oscillators, Ultrafast imaging, Raman scattering, Polarization, Photonic crystal fibers, Optical imaging, Optical amplifiers, Nonlinear optics, Mode locking

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Proceedings Article | 25 August 2020 Presentation

Ultrafast light manipulation by using nonlinear chiral meta-mirror

Cheng-Yu Wang, Lei Kang, Xuexue Guo, Xingjie Ni, Douglas Werner, Zhiwen Liu

Proceedings Volume 11497, 114970M (2020) https://doi.org/10.1117/12.2570776

KEYWORDS: Ultrafast phenomena, Dielectric polarization, Amorphous silicon, Split ring resonators, Silver, Silica, Light-matter interactions, Absorption, Picosecond phenomena, Modulation

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Proceedings Article | 20 August 2020 Presentation

Convolutional neural network reconstruction of ultrashort optical pulses

Joshua Noble, Chen Zhou, William Murray, Zhiwen Liu

Proceedings Volume 11497, 114970L (2020) https://doi.org/10.1117/12.2571172

KEYWORDS: Convolutional neural networks, Ultrafast phenomena, Nonlinear optics, Reconstruction algorithms, Ultrafast measurement systems, Nanoprobes, Nonlinear filtering, Phase retrieval

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Proceedings Article | 9 September 2019 Presentation

Characterization of second-order nonlinear optical properties of two-dimensional materials (Conference Presentation)

William Murray, Yimin Ding, Ethan Kahn, Michael Lucking, Yin-Ting Yeh, Josh Noble, Xingjie Ni, Humberto Terrones, Mauricio Terrones, Zhiwen Liu

Proceedings Volume 11122, 111220J (2019) https://doi.org/10.1117/12.2532657

KEYWORDS: Harmonic generation, Second-harmonic generation, Sum-frequency generation, Transition metals, Biological research, Femtosecond phenomena

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Proceedings Article | 17 September 2018 Presentation

Reconfigurable particle assembly for optical applications (Conference Presentation)

Cheng-Yu Wang, Philip Donahue, Chenji Zhang, Jennifer Miller, Nicholas Nye, Rong Tang, Demetrios Christodoulides, Christine Keating, Zhiwen Liu

Proceedings Volume 10753, 107530C (2018) https://doi.org/10.1117/12.2323106

KEYWORDS: Particles, Imaging systems, Nanoparticles, Refractive index, Scattering, Random lasers

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Proceedings Article | 17 September 2018 Presentation

Characterization of second-order nonlinear optical properties of two-dimensional transition metal dichalcogenides (Conference Presentation)

William Murray, Ana Laura-Elias, Kazunori Fujisawa, Michael Lucking, Ethan Kahn, Yimin Ding, Humberto Terrones, Mauricio Terrones, Xingjie Ni, Zhiwen Liu

Proceedings Volume 10753, 107530M (2018) https://doi.org/10.1117/12.2322374

KEYWORDS: Transition metals, Second-harmonic generation, Nonlinear optics, Crystals, Nonlinear crystals, Resonance enhancement, Harmonic generation, Sum-frequency generation, Wavelength tuning, Femtosecond phenomena

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Proceedings Article | 17 September 2018 Presentation

Characterization of band shifting imaging probes under two-photon excitation (Conference Presentation)

Yizhu Chen, Jimin Kim, Dingbowen Wang, Yimin Ding, Xingjie Ni, Jian Yang, Zhiwen Liu

Proceedings Volume 10753, 107530D (2018) https://doi.org/10.1117/12.2322174

KEYWORDS: Two photon imaging, Luminescence, Colorimetry, Computer programming

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