Prof. Zhiwen Liu Profile

Prof. Zhiwen Liu

Professor at Pennsylvania State Univ

SPIE Involvement:

Conference Chair | Editor | Author | Student Chapter Advisor

Publications (39)

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

Proc. SPIE. 11497, Ultrafast Nonlinear Imaging and Spectroscopy VIII

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

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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

Proc. SPIE. 11497, Ultrafast Nonlinear Imaging and Spectroscopy VIII

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

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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

Proc. SPIE. 11122, Ultrafast Nonlinear Imaging and Spectroscopy VII

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

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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

Proc. SPIE. 10753, Ultrafast Nonlinear Imaging and Spectroscopy VI

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

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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

Proc. SPIE. 10753, Ultrafast Nonlinear Imaging and Spectroscopy VI

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

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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

Proc. SPIE. 10753, Ultrafast Nonlinear Imaging and Spectroscopy VI

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

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Proceedings Article | 19 September 2017 Presentation

Tunable optical source based on divided pulse soliton self-frequency shift (Conference Presentation)

Chenji Zhang, Victor Bucklew, Perry Edwards, Corey Janisch, Zhiwen Liu

Proc. SPIE. 10380, Ultrafast Nonlinear Imaging and Spectroscopy V

KEYWORDS: Second-harmonic generation, Spectroscopy, Interferometry, Solitons, Imaging spectroscopy, Nonlinear optics, Ultrafast lasers, Harmonic generation, Ultrafast laser spectroscopy, Ultrafast imaging

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Proceedings Article | 19 September 2017 Presentation

Iteratively-seeded mode-locking for high performance ultrashort pulsed lasers (Conference Presentation)

Victor Bucklew, William Renninger, Perry Edwards, Zhiwen Liu

Proc. SPIE. 10380, Ultrafast Nonlinear Imaging and Spectroscopy V

KEYWORDS: Femtosecond phenomena, Biomedical optics, Mode locking, Spectroscopy, Fluorescence spectroscopy, Laser processing, Laser applications, Imaging spectroscopy, Pulsed laser operation, Multiphoton spectroscopy

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Proceedings Article | 19 September 2017 Presentation

Step-index optical fiber based on citrate-based synthetic polymers (Conference Presentation)

Chenji Zhang, Dingying Shan, Jian Yang, Zhiwen Liu

Proc. SPIE. 10380, Ultrafast Nonlinear Imaging and Spectroscopy V

KEYWORDS: Multimode fibers, Optical fibers, Optical design, Biomedical optics, Waveguides, Optical properties, Tissues, Polymers, Deep tissue imaging, Tissue optics

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Proceedings Article | 19 September 2017 Presentation

Sum frequency generation holography (Conference Presentation)

Ding Ma, Christopher Lee, Yizhu Chen, Nikhil Mehta, Seong Kim, Zhiwen Liu

Proc. SPIE. 10380, Ultrafast Nonlinear Imaging and Spectroscopy V

KEYWORDS: Holography, Second-harmonic generation, Spectroscopy, Imaging spectroscopy, Harmonic generation, Sum-frequency generation, Ultrafast laser spectroscopy, 3D image processing, Ultrafast imaging

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Proceedings Article | 19 September 2017 Presentation

Nonlinear characterization of two dimensional materials (Conference Presentation)

Alexander Cocking, William Murray, Kazunori Fujisawa, Anna Elias, Mauricio Terrones, Zhiwen Liu

Proc. SPIE. 10380, Ultrafast Nonlinear Imaging and Spectroscopy V

KEYWORDS: Ultrafast phenomena, Optical properties, Spectroscopy, Imaging spectroscopy, Transition metals, Nonlinear optics, Harmonic generation, Sum-frequency generation, Ultrafast laser spectroscopy, Ultrafast imaging

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Proceedings Article | 7 September 2017 Presentation + Paper

Smartphone chloridometer for point-of-care applications

Chenji Zhang, Jimin Kim, Michael Creer, Jian Yang, Zhiwen Liu

Proc. SPIE. 10380, Ultrafast Nonlinear Imaging and Spectroscopy V

KEYWORDS: Point-of-care devices, Imaging systems, Sensors, Spectroscopy, Luminescence, Diagnostics, Imaging spectroscopy, Testing and analysis, Californium, Cystic fibrosis

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Proceedings Article | 23 February 2017 Presentation + Paper

Surface enhanced Raman scattering in whispering gallery mode microresonators

Steven Huang, Xuefeng Jiang, Corey Janisch, Alexander Cocking, Zhiwen Liu, Lan Yang

Proc. SPIE. 10081, Frontiers in Biological Detection: From Nanosensors to Systems IX

KEYWORDS: Tunable lasers, Microresonators, Resonators, Silica, Silicon, Surface enhanced Raman spectroscopy, Raman spectroscopy, Raman scattering, Fiber couplers, Resonance enhancement, Photonic nanostructures, Rhodamine

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Proceedings Article | 2 November 2016 Presentation

Biodegradable polymer optical fiber (Conference Presentation)

Chenji Zhang, Surge Kalaba, Dingying Shan, Kaitian Xu, Jian Yang, Zhiwen Liu

Proc. SPIE. 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV

KEYWORDS: Optical fibers, Photonic devices, Biomedical optics, Tissues, Polymers, Imaging spectroscopy, Structured optical fibers, Polymer optical fibers, Tissue optics, Optics manufacturing

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Proceedings Article | 2 November 2016 Presentation

Low wavenumber Raman spectroscopy using atomic filters (Conference Presentation)

Xiaobo Xue, Corey Janisch, Yizhu Chen, Zhiwen Liu, Jingbiao Chen

Proc. SPIE. 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV

KEYWORDS: Semiconductors, Thermography, Optical filters, Silica, Complex systems, Imaging spectroscopy, Linear filtering, Raman spectroscopy, Laser resonators, Laser systems engineering

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Proceedings Article | 2 November 2016 Presentation

Raman sensing in optical microresonantors (Conference Presentation)

Alexander Cocking, Corey Janisch, Steven Huang, Lan Yang, Zhiwen Liu

Proc. SPIE. 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV

KEYWORDS: Microresonators, Optical sensing, Resonators, Sensors, Spectroscopy, Particles, Imaging spectroscopy, Semiconductor lasers, Raman spectroscopy, Raman scattering

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Proceedings Article | 2 November 2016 Presentation

Second order nonlinear characterization of two dimensional materials (Conference Presentation)

Corey Janisch, Ana Laura-Elias, Mauricio Terrones, Zhiwen Liu

Proc. SPIE. 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV

KEYWORDS: Optical properties, Spectroscopy, Imaging spectroscopy, Transition metals, Nonlinear optics, Harmonic generation, Nonlinear response, Ultrafast laser spectroscopy, Resonance enhancement, Ultrafast imaging

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Proceedings Article | 31 August 2015 Paper

Raman sensing in microresonators

Corey Janisch, Alexander Cocking, Lan Yang, Zhiwen Liu

Proc. SPIE. 9584, Ultrafast Nonlinear Imaging and Spectroscopy III

KEYWORDS: Optical filters, Microresonators, Resonators, Silica, Particles, Raman spectroscopy, Signal processing, Raman scattering, Chemical analysis, Picosecond phenomena

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Proceedings Article | 17 September 2014 Paper

Holographic frequency resolved optical gating for spatio-temporal characterization of ultrashort optical pulse

Nikhil Mehta, Chuan Yang, Yong Xu, Zhiwen Liu

Proc. SPIE. 9198, Ultrafast Nonlinear Imaging and Spectroscopy II

KEYWORDS: Ultrafast phenomena, Holography, Second-harmonic generation, Interferometry, Numerical simulations, Computer simulations, Phase retrieval, Nonlinear optics, Phase measurement, Algorithms

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Proceedings Article | 17 September 2014 Paper

Harmonic generation in 2D layered materials

Corey Janisch, Ding Ma, Nikhil Mehta, Ana Laura-Elias, Nestor Perea-Lopez, Mauricio Terrones, Zhiwen Liu

Proc. SPIE. 9198, Ultrafast Nonlinear Imaging and Spectroscopy II

KEYWORDS: Fabry–Perot interferometers, Second-harmonic generation, Silica, Crystals, Interfaces, Silicon, Transmission electron microscopy, Nonlinear optics, Harmonic generation, Nonlinear crystals

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SPIE Journal Paper | 3 September 2014

Measurement of atmospheric oxygen using long-path supercontinuum absorption spectroscopy

David Brown, Andrea Brown, Perry Edwards, Zhiwen Liu, C. Russell Philbrick

JRS Vol. 8 Issue 01

KEYWORDS: Oxygen, Absorption, Absorption spectroscopy, Spectroscopic atmospheric monitoring techniques, Atmospheric laser remote sensing, Atmospheric sensing, Supercontinuum sources, Algorithm development, Atmospheric optics, Optical filters

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Proceedings Article | 28 September 2013 Paper

Raman spectroscopic sensing using whispering gallery microresonators

Perry Edwards, Corey Janisch, Bo Peng, Sahin Ozdemir, Lan Yang, Zhiwen Liu

Proc. SPIE. 8845, Ultrafast Imaging and Spectroscopy

KEYWORDS: Optical filters, Microresonators, Resonators, Spectroscopy, Particles, Photons, Raman spectroscopy, Raman scattering, Signal generators, Signal detection

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Proceedings Article | 28 September 2013 Paper

CMOS: a compressive sensing based template for high-resolution multi-heterodyne optical spectroscopy

Nikhil Mehta, Zhiwen Liu

Proc. SPIE. 8845, Ultrafast Imaging and Spectroscopy

KEYWORDS: Statistical analysis, Sensors, Multiplexing, Frequency combs, Heterodyning, Optical spectroscopy, Terahertz radiation, Optical resolution, Absorption, Compressed sensing

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Proceedings Article | 15 October 2012 Paper

Flexible zero refractive index optical metamaterial with matched impedance

Seokho Yun, Lan Lin, Zhi Hao Jiang, Ding Ma, Zhiwen Liu, Douglas Werner, Theresa Mayer

Proc. SPIE. 8455, Metamaterials: Fundamentals and Applications V

KEYWORDS: Gold, Metamaterials, Refractive index, Genetic algorithms, Optical properties, Magnetism, Free space, Reactive ion etching, Optical metamaterials, Absorption

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Proceedings Article | 18 May 2012 Paper

A compact optical spectrometer based on a single-grating Fresnel diffractive optical element

Chuan Yang, Perry Edwards, Kebin Shi, Zhiwen Liu

Proc. SPIE. 8374, Next-Generation Spectroscopic Technologies V

KEYWORDS: Optical filters, Optical sensors, Diffractive optical elements, Sensors, Dispersion, Spectroscopy, Spectral resolution, Fresnel lenses, Neodymium, Francium

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Proceedings Article | 11 September 2010 Paper

Multilayer near-IR metallo-dielectric zero index metamaterials with matched impedance

Seokho Yun, Zhi Hao Jiang, Qian Xu, Jeremy Bossard, Douglas Werner, Zhiwen Liu, Theresa Mayer

Proc. SPIE. 7754, Metamaterials: Fundamentals and Applications III

KEYWORDS: Gold, Metamaterials, Refractive index, Multilayers, Genetic algorithms, Silica, Free space, Neodymium, Electromagnetism, Absorption

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Proceedings Article | 18 August 2010 Paper

Femtosecond optical Kerr gating using nonlinear photonic crystal fiber

Qian Xu, Kebin Shi, Zhiwen Liu

Proc. SPIE. 7775, Liquid Crystals XIV

KEYWORDS: Optical filters, Beam splitters, Photonic crystal fibers, Femtosecond phenomena, Polarization, Polarizers, Linear filtering, Nonlinear optics, Electronic filtering, Nonlinear crystals

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Proceedings Article | 2 May 2009 Paper

Supercontinuum laser sensing of atmospheric constituents

Perry Edwards, Andrea Wyant, David Brown, Zhiwen Liu, C. Russell Philbrick

Proc. SPIE. 7323, Laser Radar Technology and Applications XIV

KEYWORDS: LIDAR, Spectroscopy, Error analysis, Oxygen, Supercontinuum sources, Transmittance, Absorption spectroscopy, Atmospheric sensing, Atmospheric optics, Absorption

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Proceedings Article | 2 September 2008 Paper

THz generation in multiple air plasmas

Meng-Ku Chen, Jae Hun Kim, Chia-En Yang, Stuart Yin, Zhiwen Liu, R. Hui

Proc. SPIE. 7056, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II

KEYWORDS: Mirrors, Crystals, Plasmas, Coating, Imaging spectroscopy, Terahertz radiation, Aluminum, Sapphire lasers, Signal generators, Laser systems engineering

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Proceedings Article | 16 April 2008 Paper

Supercontinuum lidar applications for measurements of atmospheric constituents

David Brown, Zhiwen Liu, C. Russell Philbrick

Proc. SPIE. 6950, Laser Radar Technology and Applications XIII

KEYWORDS: Signal to noise ratio, Atmospheric laser remote sensing, LIDAR, Computer simulations, Oxygen, Data processing, Supercontinuum sources, Algorithm development, Atmospheric optics, Absorption

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Proceedings Article | 11 September 2006 Paper

Single-particle optical scattering spectroscopy in white light supercontinuum optical tweezers

Peng Li, Kebin Shi, Zhiwen Liu

Proc. SPIE. 6326, Optical Trapping and Optical Micromanipulation III

KEYWORDS: Refractive index, Optical spheres, Scattering, Spectroscopy, Particles, Light scattering, Laser scattering, Optical tweezers, Mie scattering, Spherical lenses

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Proceedings Article | 24 August 2006 Paper

Infrared and terahertz generation by ultrafast laser pulses

Fei Wu, Jae hun Kim, Peng Li, Zhiwen Liu, Karl Reichard, John Mazurowski, Stuart Yin

Proc. SPIE. 6314, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XII

KEYWORDS: Light sources, Polymers, Spectroscopy, Crystals, Wave propagation, Nonlinear optics, Ultrafast lasers, Terahertz radiation, Infrared radiation, Supercontinuum generation

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Proceedings Article | 7 November 2005 Paper

3D method via time and spatially multiplexed confocal microscope

Fei Wu, Kebin Shi, Zhiwen Liu, Xueqian Zhang, Joseph Cheung, Karl Reichard, Stuart Yin

Proc. SPIE. 6000, Two- and Three-Dimensional Methods for Inspection and Metrology III

KEYWORDS: Confocal microscopy, Microscopes, Modulation, Calibration, Luminescence, Ions, Calcium, Multiplexing, Objectives, Signal detection

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Proceedings Article | 8 September 2005 Paper

Integration of segmented 3D image data measured by projected fringe profilometry using supercontinuum light

Wei-Hung Su, Zhiwen Liu, Kebin Shi, Karl Reichard, Shizhuo Yin

Proc. SPIE. 5911, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XI

KEYWORDS: Fringe analysis, Photonic crystal fibers, Fluctuations and noise, Imaging systems, Image segmentation, CCD cameras, 3D metrology, Nonlinear crystals, 3D image processing, Light

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Proceedings Article | 16 December 2004 Paper

Surface profile measurement using chromatic confocal microscopy

Kebin Shi, Peng Li, Shizhuo Yin, Zhiwen Liu

Proc. SPIE. 5606, Two- and Three-Dimensional Vision Systems for Inspection, Control, and Metrology II

KEYWORDS: Signal to noise ratio, Confocal microscopy, Chromatic aberrations, Microscopes, Mirrors, Photonic crystal fibers, Dispersion, Fiber lasers, Colorimetry, Objectives

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SPIE Journal Paper | 1 September 2004

Analysis of volume holographic long period gratings in photonic nanostructured fibers and waveguides

Yi Yang, Kun-Wook Chung, Shizhuo Yin, Zhiwen Liu, Qing Wang

OE Vol. 43 Issue 09

KEYWORDS: Refractive index, Photonic nanostructures, Nanostructuring, Waveguides, Optical fibers, Holography, Volume holography, Cladding, Finite-difference time-domain method, Polymers

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Proceedings Article | 9 July 2004 Paper

Highly sensitive sensors using in-fiber gratings fabricated in photonic crystal nanostructures

Yi Yang, Kun-Wook Chung, Shizhuo Yin, Karl Reichard, Zhiwen Liu, Qing Wang

Proc. SPIE. 5360, Photonic Crystal Materials and Devices II

KEYWORDS: Optical fibers, Refractive index, Finite-difference time-domain method, Nanostructuring, Waveguides, Cladding, Sensors, Polymers, Photonic crystals, Photonic nanostructures

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Proceedings Article | 9 July 2002 Paper

Holographic techniques for recording ultrafast events

Martin Centurion, Zhiwen Liu, Gregory Steckman, George Panotopoulos, John Hong, Demetri Psaltis

Proc. SPIE. 4737, Holography: A Tribute to Yuri Denisyuk and Emmett Leith

KEYWORDS: Mirrors, Beam splitters, Holograms, Holography, 3D image reconstruction, Digital holography, Imaging systems, CCD cameras, Digital recording, Pulsed laser operation

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