Prof. Ming C. Wu Profile

Prof. Ming C. Wu

Professor at Univ of California Berkeley

SPIE Involvement:

Author

Publications (53)

SPIE Journal Paper | 12 May 2021 Open Access

Co-planar light-actuated optoelectrowetting microfluidic device for droplet manipulation

Jodi Loo, Shao Ning Pei, Ming Wu

JOM, Vol. 1, Issue 03, 034001, (May 2021) https://doi.org/10.1117/12.10.1117/1.JOM.1.3.034001

KEYWORDS: Metals, Microfluidics, Dielectrics, Photoresistors, Optical microsystems, Projection systems, Instrument modeling, Circuit switching, System integration, Light sources

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SPIE Journal Paper | 24 March 2021 Open Access

32 × 32 silicon photonic MEMS switch with gap-adjustable directional couplers fabricated in commercial CMOS foundry

Sangyoon Han, Jeremy Beguelin, Lane Ochikubo, John Jacobs, Tae Joon Seok, Kyoungsik Yu, Niels Quack, Chang-Kyu Kim, Richard Muller, Ming Wu

JOM, Vol. 1, Issue 02, 024003, (March 2021) https://doi.org/10.1117/12.10.1117/1.JOM.1.2.024003

KEYWORDS: Switches, Directional couplers, Silicon photonics, Waveguides, Microelectromechanical systems, Switching, Silicon, Actuators, Semiconducting wafers, Scanning electron microscopy

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Proceedings Article | 5 March 2021 Poster + Presentation + Paper

Image classification using delay-based optoelectronic reservoir computing

Philip Jacobson, Mizuki Shirao, Kerry Yu, Guan-Lin Su, Ming Wu

Proceedings Volume 11703, 117031O (2021) https://doi.org/10.1117/12.2578062

KEYWORDS: Device simulation, Image processing, Machine learning, Modulators, Nonlinear optics, Time division multiplexing, Convolutional neural networks, Image classification, Optoelectronics

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Proceedings Article | 10 March 2020 Presentation

Enhanced electroluminescence from WSe2 monolayers coupled to gold antenna arrays (Conference Presentation)

Kevin Han, Geun Ho Ahn, Joy Cho, Seth Fortuna, George Zhang, Ali Javey, Ming Wu

Proceedings Volume 11282, 1128209 (2020) https://doi.org/10.1117/12.2543083

KEYWORDS: Optical antennas, Sensors, Light sources, Optoelectronics, Transition metals, Polarization, Light emitting diodes, Gold, Electroluminescence, Antennas

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Proceedings Article | 22 February 2018 Paper

Silicon photonic MEMS variable optical attenuator

Teodoro Graziosi, Hamed Sattari, Tae Joon Seok, Sangyoon Han, Ming Wu, Niels Quack

Proceedings Volume 10545, 105450H (2018) https://doi.org/10.1117/12.2317507

KEYWORDS: Signal attenuation, Waveguides, Microelectromechanical systems, Silicon photonics, Scattering, Variable optical attenuators, Wave propagation, Photonic integrated circuits

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Proceedings Article | 7 March 2014 Paper

High-speed 32×32 MEMS optical phased array

Mischa Megens, Byung-Wook Yoo, Trevor Chan, Weijian Yang, Tianbo Sun, Connie Chang-Hasnain, Ming Wu, David Horsley

Proceedings Volume 8977, 89770H (2014) https://doi.org/10.1117/12.2044197

KEYWORDS: Mirrors, Phased array optics, Microelectromechanical systems, Phase shifts, Beam steering, Reflectivity, Liquid crystals, Binary data, Diffraction, Silicon

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Proceedings Article | 19 February 2014 Paper

High-contrast grating MEMS optical phase-shifters for two-dimensional free-space beam steering

Mischa Megens, Byung-Wook Yoo, Trevor Chan, Weijian Yang, Tianbo Sun, Connie Chang-Hasnain, Ming Wu, David Horsley

Proceedings Volume 8995, 89950Q (2014) https://doi.org/10.1117/12.2045341

KEYWORDS: Phase measurement, Linear filtering, Interfaces, Reflectivity, Beam steering, Fabry–Perot interferometers, Phased array optics, Microelectromechanical systems, Phase shifts, Mirrors

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Proceedings Article | 15 March 2013 Paper

Optical phased array using single crystalline silicon high-contrast-gratings for beamsteering

Byung-Wook Yoo, Trevor Chan, Mischa Megens, Tianbo Sun, Weijian Yang, Yi Rao, David Horsley, Connie Chang-Hasnain, Ming Wu

Proceedings Volume 8633, 86330F (2013) https://doi.org/10.1117/12.2007193

KEYWORDS: Mirrors, Phased array optics, Silicon, Reflectivity, Microelectromechanical systems, Crystals, Phase shifts, Semiconducting wafers, Laser crystals, Liquid crystals

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Proceedings Article | 15 March 2013 Paper

Optical phased array using high-contrast grating all-pass filters for fast beam steering

Weijian Yang, Tianbo Sun, Yi Rao, Trevor Chan, Mischa Megens, Byung-Wook Yoo, David Horsley, Ming Wu, Connie Chang-Hasnain

Proceedings Volume 8633, 86330G (2013) https://doi.org/10.1117/12.2004756

KEYWORDS: Beam steering, Mirrors, Phased array optics, Linear filtering, Reflection, Phased arrays, Near field, Phase shifts, Fabry–Perot interferometers, Reflectivity

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Proceedings Article | 23 February 2012 Paper

Low-loss hollow-core waveguide using high-contrast sub-wavelength grating

James Ferrara, Weijian Yang, Anthony Yeh, Karen Grutter, Christopher Chase, Vadim Karagodsky, Devang Parekh, Yang Yue, Alan Willner, Ming Wu, Connie Chang-Hasnain

Proceedings Volume 8270, 82700I (2012) https://doi.org/10.1117/12.909773

KEYWORDS: Waveguides, Silicon, Cladding, Light wave propagation, Wave propagation, Semiconducting wafers, Refractive index, Radio propagation, Finite element methods, Geometrical optics

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Proceedings Article | 11 February 2010 Paper

Quantifying heat transfer in DMD-based optoelectronic tweezers with infrared thermography

Peter Pauzauskie, Hsan-Yin Hsu, Arash Jamshidi, Justin Valley, Shao Ning Pei, Ming Wu

Proceedings Volume 7596, 759609 (2010) https://doi.org/10.1117/12.846247

KEYWORDS: Glasses, Thermography, Silicon, Temperature metrology, Thermoelectric materials, Optoelectronics, Cameras, Dielectrophoresis, Electrodes, Particles

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Proceedings Article | 24 February 2009 Paper

Using MEMS mirrors to pattern electrical forces

Steven Neale, Hsan-Yin Hsu, Justin Valley, Arash Jamshidi, Ming Wu

Proceedings Volume 7209, 720909 (2009) https://doi.org/10.1117/12.828042

KEYWORDS: Particles, Adaptive optics, Liquids, Photoresistors, Microelectromechanical systems, Projection systems, Silicon, Mirrors, Phototransistors, Dielectrophoresis

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Proceedings Article | 14 February 2009 Paper

Force versus position profiles of HeLa cells trapped in phototransistor-based optoelectronic tweezers

Steven Neale, Aaron Ohta, Hsan-Yin Hsu, Justin Valley, Arash Jamshidi, Ming Wu

Proceedings Volume 7210, 721004 (2009) https://doi.org/10.1117/12.809513

KEYWORDS: Particles, Phototransistors, Optoelectronics, Silicon, Projection systems, Liquids, Photoresistors, Amorphous silicon, Luminescence, Reactive ion etching

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Proceedings Article | 29 August 2008 Paper

Optoelectronic tweezers (OET) trap stiffness with HeLa cells

Steven Neale, Aaron Ohta, Hsan-Yin Hsu, Justin Valley, Arash Jamshidi, Ming Wu

Proceedings Volume 7038, 70381K (2008) https://doi.org/10.1117/12.793899

KEYWORDS: Particles, Dielectrophoresis, Projection systems, Optoelectronics, Photoresistors, Glasses, Liquids, Optical tweezers, Instrument modeling, Objectives

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Proceedings Article | 6 May 2008 Paper

Optofluidics and optoelectronic tweezers

Arash Jamshidi, Aaron Ohta, Justin Valley, Hsan-Yin Hsu, Steven Neale, Ming Wu

Proceedings Volume 6993, 69930A (2008) https://doi.org/10.1117/12.787019

KEYWORDS: Particles, Dielectrophoresis, Liquids, Optoelectronics, Silicon, Electrodes, Light sources, Semiconductor lasers, Phototransistors, Nanowires

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Proceedings Article | 15 February 2007 Paper

Characterization of quality-factor tunable integrated silicon microtoroidal resonators

Jin Yao, David Leuenberger, Ming Wu

Proceedings Volume 6475, 647502 (2007) https://doi.org/10.1117/12.699847

KEYWORDS: Resonators, Waveguides, Microresonators, Silicon, Transmittance, Crystals, Integrated optics, Wafer-level optics, Hydrogen, Annealing

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Proceedings Article | 13 October 2006 Paper

Monolithic wavelength-selective switches and cross connects with integrated MEMS mirror array

Chao-Hsi Chi, Ming Wu

Proceedings Volume 6376, 63760G (2006) https://doi.org/10.1117/12.687121

KEYWORDS: Micromirrors, Silicon, Microelectromechanical systems, Switches, Reflectors, Switching, Waveguides, Mirrors, Coarse wavelength division multiplexing, Wavelength division multiplexing

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Proceedings Article | 5 October 2006 Paper

Optically controlled manipulation of live cells using optoelectronic tweezers

Aaron Ohta, Pei-Yu Chiou, Ming Wu

Proceedings Volume 6326, 632617 (2006) https://doi.org/10.1117/12.679710

KEYWORDS: Dielectrophoresis, Electrodes, Particles, Blood, Optical tweezers, Optoelectronics, Optical manipulation, Image analysis, Liquids, Microscopes

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Proceedings Article | 1 April 2005 Paper

Ultrahigh resolution OCT imaging with a two-dimensional MEMS scanning endoscope

Aaron Aguirre, Paul Herz, Yu Chen, James Fujimoto, Wibool Piyawattanametha, Li Fan, ShuTing Hsu, Makoto Fujino, Ming Wu, Daniel Kopf

Proceedings Volume 5692, (2005) https://doi.org/10.1117/12.593143

KEYWORDS: Optical coherence tomography, Microelectromechanical systems, Endoscopes, Image resolution, Endoscopy, Mirrors, Scanners, 3D image processing, Tissues, 3D scanning

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Proceedings Article | 22 January 2005 Paper

High-resolution 3D OCT imaging with a MEMS scanning endoscope

Li Fan, Wibool Piyawattanametha, Ming Wu, Aaron Aguirre, Paul Herz, Yu Chen, James Fujimoto

Proceedings Volume 5719, (2005) https://doi.org/10.1117/12.600089

KEYWORDS: Microelectromechanical systems, Optical coherence tomography, Endoscopes, Scanners, Mirrors, Endoscopy, In vivo imaging, 3D image processing, Tissues, Collimators

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Proceedings Article | 22 January 2005 Paper

Novel applications of MOEMS display and imaging

Ming Wu

Proceedings Volume 5715, (2005) https://doi.org/10.1117/12.608014

KEYWORDS: Micromirrors, Mirrors, Microelectromechanical systems, Switches, Particles, Microopto electromechanical systems, Endoscopy, Optical coherence tomography, Optoelectronics, Analog electronics

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Proceedings Article | 25 October 2004 Paper

Scanning micromirrors: an overview

Pamela Patterson, Dooyoung Hah, Makoto Fujino, Wibool Piyawattanametha, Ming Wu

Proceedings Volume 5604, (2004) https://doi.org/10.1117/12.582849

KEYWORDS: Mirrors, Scanners, Micromirrors, Electrodes, Microelectromechanical systems, Silicon, Switches, Electromagnetism, Magnetism, Actuators

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Proceedings Article | 18 October 2004 Paper

Toward all optical lab-on-a-chip system: optical manipulation of both microfluid and microscopic particles

Pei-Yu Chiou, Aaron Ohta, Ming Wu

Proceedings Volume 5514, (2004) https://doi.org/10.1117/12.560729

KEYWORDS: Particles, Liquids, Dielectrophoresis, Optical tweezers, Electrodes, Optical manipulation, Optoelectronics, Glasses, Microfluidics, Photoresistors

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To achieve all-optical-lab-on-a-chip systems, it requires optical manipulation tools for both microparticles and microfluids. Optical tweezers have attracted a great deal of interests in manipulating cells or particles. However, it is not effective in handling microfluid. Its high optical power requirement also limits its application in high throughput bio-analysis system. In this paper, we demonstrate two novel mechanisms, optoelectrowetting (OEW) for handling microdroplets, and optoelectronic tweezers (OET) for optical manipulation of microscopic particles with low optical power actuation. Instead of using direct optical force, both mechanisms rely on light induced electrical force for optical manipulation. Optoelectrowetting (OEW) enables control of microfluids in droplet form by optical beams. It is based on light induced electrowetting, which changes surface tension at solid-liquid interface at illuminated area. It is realized by integrating a layer of photoconductive material with electrowetting electrodes. By programming the illumination pattern, we have successfully demonstrated various functions for droplet, such as moving, splitting, and merging. A 100 pico-liter droplet was transported at a speed of 785um/sec by an optical beam with an optical power of 100mW. Optoelectronic tweezers (OET) manipulate cells or particles based on light induced dielectrophoresis (DEP). Trapping or repelling of microscopic particles is achieved with a light intensity of 2W/cm^2, which is 5 orders of magnitudes lower than that required by optical tweezers (10^5~ 10^7 W/cm^2). The liquid containing cells or particles is sandwiched between a photosensitive surface and a transparent ITO glass, with an ac bias between them.. When the laser beam is focused on the photosensitive layer, it creates a virtual electrode on the illuminated area, resulting a non-uniform electric field at the aqueous layer. Cells or particles in the liquid layer are polarized by this non-uniform electric field and driven by the DEP force. The force could be attractive or repulsive, depending on the dielectric properties of the particles and the bias frequency. Using OET, we have demonstrated concentration of polystyrene particles and live E.coli cells using an optical power less than 10uW.

Proceedings Article | 14 August 2003 Paper

Recent advances and future prospects in high-speed and high-saturation-current photodetectors

M. Saif Islam, Ming Wu

Proceedings Volume 5246, (2003) https://doi.org/10.1117/12.511278

KEYWORDS: Photodetectors, Photodiodes, Waveguides, Palladium, Receivers, RF photonics, Microwave radiation, Sensors, Diodes, Brain-machine interfaces

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Proceedings Article | 14 August 2003 Paper

High-speed high-power traveling-wave distributed photodetectors with backward wave cancellation

Sanjeev Murthy, S. Kim, T. Jung, Z. Wang, Wei Hsin, Ming Wu

Proceedings Volume 5246, (2003) https://doi.org/10.1117/12.511220

KEYWORDS: Metals, Brain-machine interfaces, Etching, Sensors, Absorption, Wave propagation, Waveguides, Photodiodes, Diodes, Photodetectors

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Proceedings Article | 1 July 2003 Open Access

Quantum cascade transmitters for ultrasensitive chemical agent and explosives detection

John Schultz, Matthew Taubman, Warren Harper, Richard Williams, Tanya Myers, Bret Cannon, David Sheen, Norman Anheier, Paul Allen, S. Sundaram, Bradley Johnson, Pamela Aker, Ming Wu, Erwin Lau

Proceedings Volume 4999, (2003) https://doi.org/10.1117/12.485542

KEYWORDS: Quantum cascade lasers, Modulation, Frequency modulation, Absorption, Sensors, Fermium, Signal detection, Optical resonators, Transmitters, Waveguides

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Proceedings Article | 15 November 2002 Paper

Recent advances in optical MEMS devices and systems

Pamela Patterson, Dooyoung Hah, Mark Lee, Jui Che Tsai, Ming Wu

Proceedings Volume 4788, (2002) https://doi.org/10.1117/12.453712

KEYWORDS: Micromirrors, Mirrors, Photonic crystals, Microopto electromechanical systems, Microelectromechanical systems, Silicon, Switching, Switches, Actuators, Oxides

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Proceedings Article | 19 April 2002 Paper

Design of electrostatic actuators for MOEMS applications

Dooyoung Hah, Hiroshi Toshiyoshi, Ming Wu

Proceedings Volume 4755, (2002) https://doi.org/10.1117/12.462812

KEYWORDS: Actuators, Electrodes, Capacitance, Mirrors, Micromirrors, Finite element methods, Microopto electromechanical systems, Microelectromechanical systems, Telecommunications, Digital micromirror devices

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Proceedings Article | 27 December 2001 Paper

Simultaneous suppression of laser relative intensity noise: second- and third-order distortions using a balanced electro-absorption modulator

Sagi Mathai, Federica Capelluti, Thomas Jung, Dalma Novak, Rod Waterhouse, Deborah Sivco, Alfred Cho, Giovanni Ghione, Ming Wu

Proceedings Volume 4490, (2001) https://doi.org/10.1117/12.455424

KEYWORDS: Modulators, Modulation, Neodymium, Photonics, Photodetectors, Spectrum analysis, Optical amplifiers, Variable optical attenuators, Polarization, Error control coding

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Proceedings Article | 18 May 2001 Paper

Surface-micromachined 2D optical scanners with optically flat single-crystalline silicon micromirrors

John Su, Pamela Patterson, Ming Wu

Proceedings Volume 4293, (2001) https://doi.org/10.1117/12.426942

KEYWORDS: Mirrors, Micromirrors, Silicon, Scanners, Crystals, Semiconducting wafers, Microelectromechanical systems, Deep reactive ion etching, Optical scanning, Wafer-level optics

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Proceedings Article | 7 September 2000 Paper

Wideband signal processing applications for coherent optical channelizers

Richard Davis, Lawrence Lembo, Wenshen Wang, Robert Lodenkamper, Thomas Jung, John Brock, Ming Wu

Proceedings Volume 4112, (2000) https://doi.org/10.1117/12.399384

KEYWORDS: Channel projecting optics, Signal processing, Electronics, Receivers, Sensors, System integration, Modulators, Modulation, Heterodyning, Diffraction gratings

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Proceedings Article | 12 November 1999 Paper

Distributed balanced photodetectors for high-performance rf photonic systems

Saiful Islam, Tai Chau, Ming Wu, Deborah Sivco, Alfred Cho

Proceedings Volume 3795, (1999) https://doi.org/10.1117/12.370170

KEYWORDS: Receivers, Photodiodes, Waveguides, Photodetectors, Signal detection, Signal to noise ratio, Microwave radiation, Sensors, Interference (communication), Capacitance

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Proceedings Article | 26 January 1999 Paper

Multiwavelength optical code division multiplexing

Cedric Lam, Rutger Vrijien, Ming Wu, Eli Yablonovitch, Dennis Tong

Proceedings Volume 10293, 1029308 (1999) https://doi.org/10.1117/12.335924

KEYWORDS: Code division multiplexing, Optical design, Explosives, Optical communications, Telecommunications, Optical fibers, Speckle

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Proceedings Article | 3 November 1998 Paper

RF performance of optical injection locking

Robert Lodenkamper, Thomas Jung, Richard Davis, Lawrence Lembo, Ming Wu, John Brock

Proceedings Volume 3463, (1998) https://doi.org/10.1117/12.330390

KEYWORDS: Semiconductor lasers, Heterodyning, Sensors, Signal processing, Phase measurement, Signal detection, Acoustics, Channel projecting optics, Polarization, Interference (communication)

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Proceedings Article | 2 September 1998 Paper

Optical coupling analysis and vibration characterization for packaging of 2X2 MEMS vertical torsion mirror switches

Long-Sun Huang, Shi-sheng Lee, M. Edward Motamedi, Ming Wu, Chang-Jin Kim

Proceedings Volume 3513, (1998) https://doi.org/10.1117/12.324267

KEYWORDS: Mirrors, Switches, Microelectromechanical systems, Gold, Packaging, Silicon, Fiber couplers, Fiber optics, Local area networks, Electrodes

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Proceedings Article | 22 June 1998 Paper

Surface micromachined devices for microwave and photonic applications

M. Chang, Ming Wu, JeyHsin Yao, M. Edward Motamedi

Proceedings Volume 3419, 34190S (1998) https://doi.org/10.1117/12.311012

KEYWORDS: Microwave radiation, Microwave photonics, Photonic microstructures, Microelectromechanical systems, Microopto electromechanical systems

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Proceedings Article | 20 April 1998 Paper

MEMS actuators and micropositioners for integrated micro-optics

Shi-sheng Lee, Li Fan, Ming Wu

Proceedings Volume 3289, (1998) https://doi.org/10.1117/12.305479

KEYWORDS: Actuators, Switches, Microelectromechanical systems, Micropositioners, Silicon, Fiber optics, Switching, Optical components, Micro optics, Micromirrors

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Proceedings Article | 1 February 1998 Paper

Spectrally encoded CDMA system using Mach-Zehnder encoder chains

Cedric Lam, Rutger Vrijen, Dennis Tong, Ming Wu, Eli Yablonovitch

Proceedings Volume 3228, (1998) https://doi.org/10.1117/12.300910

KEYWORDS: Computer programming, Code division multiplexing, Optical fibers, Optical filters

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Proceedings Article | 2 September 1997 Paper

G-performance characterization of surface-micromachined FDDI optical bypass switches

Shi-sheng Lee, M. Edward Motamedi, Ming Wu

Proceedings Volume 3226, (1997) https://doi.org/10.1117/12.284575

KEYWORDS: Switches, Local area networks, Integrated optics, Interfaces, Micromirrors, Actuators

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SPIE Journal Paper | 1 May 1997

Micro-opto-electro-mechanical devices and on-chip optical processing

M. Edward Motamedi, Ming Wu, Kristofer Pister

OE, Vol. 36, Issue 05, (May 1997) https://doi.org/10.1117/12.10.1117/1.601356

KEYWORDS: Microlens, Microelectromechanical systems, Mirrors, Optical signal processing, Switches, Digital micromirror devices, Fabry–Perot interferometers, Microlens array, Photoresist materials, Micro optics

Proceedings Article | 10 April 1997 Paper

Monolithic mode-locked semiconductor laser for continuously tunable millimeter-wave transmission

Dennis Tong, Ming Wu

Proceedings Volume 3038, (1997) https://doi.org/10.1117/12.271450

KEYWORDS: Extremely high frequency, Microwave radiation, Mode locking, Modulation, Semiconductor lasers, Transmitters, Optical amplifiers, Modulators, Optical filters, Bandpass filters

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Proceedings Article | 22 January 1997 Paper

High-power high-speed velocity-matched distributed photodetectors

Lih-Yuan Lin, Ming Wu, Tatsuo Itoh, Timothy Vang, Richard Muller, Deborah Sivco, Alfred Cho

Proceedings Volume 3006, (1997) https://doi.org/10.1117/12.264207

KEYWORDS: Photodiodes, Photodetectors, Waveguides, Microwave radiation, Quantum efficiency, Absorption, Active optics, Chlorine, Phase velocity, Metals

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Proceedings Article | 22 November 1996 Paper

Multiwavelength two-dimensional optically controlled phased-array antenna

Dennis Tong, Ming Wu

Proceedings Volume 2844, (1996) https://doi.org/10.1117/12.259026

KEYWORDS: Phased array optics, Antennas, Time metrology, Beam controllers, Phased arrays, Laser sources, Modulators, Prototyping, Optical components, Picosecond phenomena

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Proceedings Article | 23 September 1996 Paper

Integration of DFB lasers with surface-micromachined wavelength-monitoring devices for WDM systems

Shi-sheng Lee, Lih-Yuan Lin, Ming Wu

Proceedings Volume 2881, (1996) https://doi.org/10.1117/12.251261

KEYWORDS: Wavelength division multiplexing, Silicon, Semiconductor lasers, Photodetectors, Spectroscopy, Microlens, Light, Photomasks, Control systems, Laser stabilization

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Proceedings Article | 23 September 1996 Paper

On-chip optical processing

M. Edward Motamedi, Ming Wu, Kristofer Pister

Proceedings Volume 2881, (1996) https://doi.org/10.1117/12.251259

KEYWORDS: Microlens, Microelectromechanical systems, Mirrors, Switches, Digital micromirror devices, Diffraction, Photoresist materials, Microlens array, Fabry–Perot interferometers, Optical signal processing

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Proceedings Article | 8 March 1996 Paper

Monolithically integrated refractive microlens standing perpendicular to the substrate

Charles King, Lih-Yuan Lin, Ming Wu

Proceedings Volume 2687, (1996) https://doi.org/10.1117/12.234631

KEYWORDS: Microlens, Photoresist materials, Collimation, Spherical lenses, Lens design, Glasses, Absorption, Micro optics, Polysomnography, Telecommunications

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Proceedings Article | 13 September 1995 Paper

Micromachined three-dimensional tunable Fabry-Perot etalons

Lih-Yuan Lin, J. Shen, Shi-sheng Lee, Ming Wu

Proceedings Volume 2641, (1995) https://doi.org/10.1117/12.220937

KEYWORDS: Fabry–Perot interferometers, Mirrors, Solids, Fabrication, Surface micromachining, Silicon, Wavelength division multiplexing, Polysomnography, Reflectivity, Scanning electron microscopy

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Proceedings Article | 13 September 1995 Paper

Realization of FDDI optical bypass switches using surface micromachining technology

Shi-sheng Lee, Lih-Yuan Lin, Ming Wu

Proceedings Volume 2641, (1995) https://doi.org/10.1117/12.220940

KEYWORDS: Switches, Local area networks, Mirrors, Multimode fibers, Free space optics, Optical components, Interfaces, Surface micromachining, Optical fibers, Electronics

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Proceedings Article | 21 October 1994 Paper

Micromachined free space integrated optics

Ming Wu, Lih-Yuan Lin, Shi-sheng Lee

Proceedings Volume 2291, (1994) https://doi.org/10.1117/12.190929

KEYWORDS: Optical components, Silicon, Vertical cavity surface emitting lasers, Mirrors, Integrated optics, Free space optics, Semiconductor lasers, Microfabrication, Lenses, Optical interconnects

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Proceedings Article | 16 May 1994 Paper

New ultrafast photodetector: optical-to-microwave transformer

Ming Wu, Lih-Yuan Lin, Tatsuo Itoh

Proceedings Volume 2116, (1994) https://doi.org/10.1117/12.175858

KEYWORDS: Photodetectors, Photodiodes, Microwave radiation, Waveguides, Ultrafast phenomena, Transformers, Quantum efficiency, Sensors, External quantum efficiency, Tolerancing

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Proceedings Article | 16 February 1993 Paper

Low-threshold InGaAs/GaAs strained-layer quantum-well lasers (lambda=0.98 micron) with GaInP cladding layers grown by chemical beam epitaxy

R. Kapre, Won-Tien Tsang, Ming Wu, Young-Kai Chen

Proceedings Volume 1788, (1993) https://doi.org/10.1117/12.141113

KEYWORDS: Quantum wells, Indium gallium phosphide, Cladding, Gallium arsenide, Laser damage threshold, Waveguides, Continuous wave operation, Fiber lasers, Quantum efficiency, Waveguide lasers

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Strained InGaAs/AlGaAs quantum well (QW) lasers operating at 0.98 micrometers are currently of great interest due to their suitability for pumping erbium-doped fiber amplifiers. They are reported to yield a lower noise figure and higher gain coefficient than the 1.48 micrometers InGaAs/InP pump lasers as well as 0.8 micrometers AlGaAs/GaAs pump lasers. In addition, the InGaAs/AlGaAs strained QW lasers have lower threshold current, higher slope efficiency, and less temperature dependance. All these factors contribute to lowering the power dissipation of the pump design. Recently Ga_0.51In_0.49P, lattice-matched to GaAs has been introduced as a substitute for the AlGaAs cladding layers due to reports suggesting its resistance to rapid degradation by dark line defect propagation and to catastrophic mirror damage. The aluminum-free system also lends itself more readily to device fabrication by selective etching and epitaxial regrowth or mass transport. We report on the first InGaAs/GaAs strained-layer QW lasers using GaInP cladding layers grown by chemical beam epitaxy. The laser structure is a separate confinement heterostructure (SCH) with the active region consisting of 70 angstroms thick In_0.2Ga_0.8As quantum well and 220 angstroms thick GaAs barriers. The active and the SCH region are cladded by Ga_0.51In_0.49P layers of 1.35 micrometers thickness. A very low broad-area threshold current density of 70 A/cm² was obtained for 1500 micrometers long single QW lasers which is among the lowest reported for InGaAs/GaAs/GaInP lasers. The J_th for two and three QW lasers were 135 A/cm² and 170 A/cm² respectively. Ridge waveguide lasers with 4 micrometers width have very low cw threshold currents: 7.8 mA for 500 micrometers -long cavity and 10 mA for 750 micrometers -long cavity. External differential quantum efficiency as high as 0.9 mW/mA was obtained for 250 micrometers -long lasers. From the slope of inverse quantum efficiency versus cavity length, a very low internal waveguide loss of 2.5 cm^-1 and an internal quantum efficiency of 0.95 are inferred.

Proceedings Article | 3 September 1992 Paper

Short pulse generation using semiconductor lasers

Young-Kai Chen, Ming Wu, Tawee Tanbun-Ek, Ralph Logan, Fow-Sen Choa, Won-Tien Tsang, M. Chin, A. Sergent

Proceedings Volume 1680, (1992) https://doi.org/10.1117/12.137702

KEYWORDS: Quantum wells, Semiconductor lasers, Mode locking, Pulsed laser operation, Optoelectronics, Semiconductors, Picosecond phenomena, Gain switching, Waveguides, Microwave radiation

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Proceedings Article | 26 June 1992 Paper

InGaAs/GaAs/InGaP strained-layer-quantum-well lasers grown by gas-source molecular beam epitaxy

Jenn-Ming Kuo, Ming Wu, Young-Kai Chen, M. Chin, A. Sergent

Proceedings Volume 1634, (1992) https://doi.org/10.1117/12.59167

KEYWORDS: Continuous wave operation, Gallium arsenide, Laser damage threshold, Cladding, Waveguide lasers, Indium gallium phosphide, External quantum efficiency, Quantum efficiency, Semiconductor lasers, Waveguides

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Showing 5 of 53 publications

Proceedings Volume Editor (1)

SPIE Conference Volume | 20 November 2009

Optoelectronic Materials and Devices IV

Conference Committee Involvement (26)

High Contrast Metastructures XII

30 January 2023 | San Francisco, California, United States

High Contrast Metastructures XI

25 January 2022 | San Francisco, California, United States

AI and Optical Data Sciences III

24 January 2022 | San Francisco, California, United States

AI and Optical Data Sciences II

6 March 2021 | Online Only, California, United States

High Contrast Metastructures X

6 March 2021 | Online Only, California, United States

AI and Optical Data Sciences

4 February 2020 | San Francisco, California, United States

High Contrast Metastructures IX

3 February 2020 | San Francisco, California, United States

High Contrast Metastructures VIII

4 February 2019 | San Francisco, California, United States

High Contrast Metastructures VII

29 January 2018 | San Francisco, California, United States

SPIE Defense + Commercial Sensing

9 April 2017 | Anaheim, United States

High Contrast Metastructures VI

31 January 2017 | San Francisco, California, United States

SPIE Defense + Commercial Sensing

17 April 2016 | Baltimore, United States

SPIE Commercial + Scientific Sensing and Imaging

17 April 2016 | Baltimore, United States

High Contrast Metastructures V

17 February 2016 | San Francisco, California, United States

SPIE Sensing Technology + Applications

20 April 2015 | Baltimore, United States

High Contrast Metastructures IV

11 February 2015 | San Francisco, California, United States

High Contrast Metastructures III

4 February 2014 | San Francisco, California, United States

SPIE MOEMS-MEMS

1 February 2014 | San Francisco, United States

High Contrast Metastructures II

5 February 2013 | San Francisco, California, United States

High Contrast Metastructures

22 January 2012 | San Francisco, California, United States

Optoelectronic Materials and Devices

2 November 2009 | Shanghai, Shanghai , China

Optoelectronic Materials and Devices III

27 October 2008 | Hangzhou, China

Nanostructure Integration Techniques for Manufacturable Devices, Circuits, and Systems: Interfaces, Interconnects, and Nanosystems

23 October 2005 | Boston, MA, United States

MOEMS Display and Imaging Systems II

26 January 2004 | San Jose, California, United States

MOEMS Display and Imaging Systems

28 January 2003 | San Jose, CA, United States

Photonics Packaging and Integration

28 January 1999 | San Jose, CA, United States

Showing 5 of 26 Conference Committees

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