Dr. Walter R. Buchwald Profile

Dr. Walter R. Buchwald

Associate Professor

SPIE Involvement:

Author

Area of Expertise:

metamaterials , plasmonics , nanophotonics , integrated photonics , quantum photonics , nanofabrication

Publications (31)

Proceedings Article | 31 January 2014 Paper

Tunable excitation of two-dimensional plasmon modes in InGaAs/InP HEMT devices for terahertz detection

Nima Nader Esfahani, Xin Qiao, Robert Peale, Walter Buchwald, Joshua Hendrickson, Justin Cleary

Proceedings Volume 8993, 89930F (2014) https://doi.org/10.1117/12.2037062

KEYWORDS: Field effect transistors, Plasmons, Absorption, Sensors, Terahertz radiation, Plasmonics, Polarization, Neodymium, Terahertz detection, Dispersion

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Proceedings Article | 29 May 2013 Paper

Active frequency selective surfaces

Walter Buchwald, Joshua Hendrickson, Justin Cleary, Junpeng Guo

Proceedings Volume 8725, 87250A (2013) https://doi.org/10.1117/12.2016081

KEYWORDS: Field effect transistors, FSS based metamaterials, Split ring resonators, Plasma, Finite-difference time-domain method, Dielectrics, Metals, Switching, Refractive index, Plasmons

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Proceedings Article | 27 March 2013 Paper

Millimeter and terahertz detectors based on plasmon excitation in InGaAs/InP HEMT devices

Nima Nader Esfahani, Robert Peale, Walter Buchwald, Joshua Hendrickson, Justin Cleary

Proceedings Volume 8624, 86240Q (2013) https://doi.org/10.1117/12.2006137

KEYWORDS: Polarization, Plasmons, Field effect transistors, Absorption, Sensors, Transmittance, Metals, Terahertz radiation, Millimeter wave sensors, Polarizers

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Proceedings Article | 15 October 2012 Paper

First observation of a plasmon-mediated tunable photoresponse in a grating-gated InGaAs/InP HEMT for millimeter-wave detection

Nima Nader Esfahani, Robert Peale, Walter Buchwald, Joshua Hendrickson, Justin Cleary

Proceedings Volume 8512, 85120Y (2012) https://doi.org/10.1117/12.930359

KEYWORDS: Polarization, Plasmons, Field effect transistors, Absorption, Terahertz radiation, Transmittance, Sensors, Dispersion, Semiconductors, Radiation effects

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Proceedings Article | 31 May 2012 Paper

Planar integrated plasmonic mid-IR spectrometer

Christopher Fredricksen, Justin Cleary, Walter Buchwald, Pedro Figueiredo, Farnood Khalilzadeh-Rezaie, Gautam Medhi, Imen Rezadad, Monas Shahzad, Mehmet Yesiltas, Janardan Nath, Javaneh Boroumand, Evan Smith, Robert Peale

Proceedings Volume 8353, 835321 (2012) https://doi.org/10.1117/12.918671

KEYWORDS: Waveguides, Silicon, Resonators, Spectroscopy, Mid-IR, Wave propagation, Electron beam lithography, Sensors, Transformers, Light wave propagation

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Proceedings Article | 19 May 2012 Paper

Cathodoluminescence of conducting gratings and implications for electron-beam investigations of nano-photonic devices

Janardan Nath, Casey Schwarz, Evan Smith, Chandana Ghosh, R. Peale, L. Chernyak, Walter Buchwald

Proceedings Volume 8376, 83760J (2012) https://doi.org/10.1117/12.918669

KEYWORDS: Gold, Silver, Visibility, Metals, Copper, Silicon, Modulation, Nanophotonics, Metalloids, Surface finishing

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Proceedings Article | 9 May 2012 Paper

Infrared surface plasmon polariton on polyaniline-graphite composite

Monas Shahzad, Gautam Medhi, Doug Maukonen, Mehmet Yesiltas, R. Peale, Walter Buchwald, Justin Cleary, Yi Liao, Candace Alber, Valentine Johns, Rahul Hegishte, Glen Boreman

Proceedings Volume 8366, 836604 (2012) https://doi.org/10.1117/12.919195

KEYWORDS: Composites, Infrared radiation, Ellipsometry, Raman spectroscopy, Plasma, FT-IR spectroscopy, Reflectivity, Surface plasmon polaritons, Polymers, Micro raman spectroscopy

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Proceedings Article | 7 May 2012 Paper

InP- and graphene-based grating-gated transistors for tunable THz and mm-wave detection

Nima Nader Esfahani, Justin Cleary, Robert Peale, Walter Buchwald, Christopher Fredricksen, Joshua Hendrickson, Michael Lodge, Ben Dawson, M. Ishigami

Proceedings Volume 8373, 837327 (2012) https://doi.org/10.1117/12.918660

KEYWORDS: Plasmons, Field effect transistors, Absorption, Finite element methods, Plasmonics, Graphene, Doping, Terahertz radiation, Transistors, Plasma

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Proceedings Article | 28 February 2012 Paper

Plasmon absorption in grating-coupled InP HEMT and graphene sheet for tunable THz detection

Nima Nader Esfahani, R. Peale, Christopher Fredricksen, Justin Cleary, Joshua Hendrickson, Walter Buchwald, Ben Dawson, M. Ishigami

Proceedings Volume 8261, 82610E (2012) https://doi.org/10.1117/12.907938

KEYWORDS: Field effect transistors, Graphene, Plasmons, Absorption, Transmittance, Beam splitters, Terahertz radiation, Spectrometers, Temperature metrology, Silicon

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Proceedings Article | 21 September 2011 Paper

Diode-coupled Ag nanoantennas for nanorectenna energy conversion

Richard Osgood, Stephen Giardini, Joel Carlson, Gustavo Fernandes, Jin Ho Kim, Jimmy Xu, Matthew Chin, Barbara Nichols, Madan Dubey, Philip Parilla, Joseph Berry, David Ginley, Prakash Periasamy, Harvey Guthrey, Ryan O'Hayre, Walter Buchwald

Proceedings Volume 8096, 809610 (2011) https://doi.org/10.1117/12.893313

KEYWORDS: Diodes, Antennas, Metals, Teeth, Oxides, Pulsed laser operation, Niobium, Nickel, Silver, Nanoantennas

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Proceedings Article | 16 September 2011 Paper

Planar integrated plasmonic mid-IR spectrometer

P. Figuierdo, J. Nath, G. Medhi, A. Muraviev, C. Fredricksen, W. Buchwald, J. Cleary, R. Peale

Proceedings Volume 8155, 815503 (2011) https://doi.org/10.1117/12.892832

KEYWORDS: Waveguides, Spectroscopy, Mid-IR, Quantum cascade lasers, Silicon, Absorption, Sensors, Resonators, Metals, Light emitting diodes

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Proceedings Article | 1 September 2011 Paper

InP- and graphene-based grating-gated transistors for tunable THz and mm-wave detection

R. Peale, Nima Nader Esfahani, Christopher Fredricksen, Gautam Medhi, Justin Cleary, Joshua Hendrickson, Walter Buchwald, Himanshu Saxena, Oliver Edwards, Michael Lodge, Ben Dawson, M. Ishigami

Proceedings Volume 8164, 816408 (2011) https://doi.org/10.1117/12.893833

KEYWORDS: Graphene, Plasmons, Field effect transistors, Absorption, Terahertz radiation, Transmittance, Plasmonics, Silicon, Transistors, Imaging systems

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Proceedings Article | 24 August 2011 Paper

Infrared surface plasmon resonance hosts for sensors

Gautam Medhi, Justin Cleary, Robert Peale, Glenn Boreman, Walter Buchwald, Sandy Wentzell, Oliver Edwards, Isaiah Oladeji

Proceedings Volume 8173, 81731N (2011) https://doi.org/10.1117/12.900100

KEYWORDS: Bismuth, Antimony, Silicon, Reflectivity, Surface plasmons, Sensors, Infrared sensors, Biological research, Infrared radiation, Biosensors

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Proceedings Article | 26 May 2011 Paper

Infrared surface waves on semiconductor and conducting polymer

Monas Shahzad, Gautam Medhi, R. Peale, Ryuichi Tsuchikawa, Masahiro Ishigami, Walter Buchwald, Justin Cleary, Glenn Boreman, Oliver Edwards, D. J. Diaz, Ted Gorman

Proceedings Volume 8024, 80240B (2011) https://doi.org/10.1117/12.884090

KEYWORDS: Silicon, Infrared radiation, Reflectivity, Polymers, Ellipsometry, Semiconductors, Plasma, Biosensors, Dielectrics, Infrared sensors

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Proceedings Article | 26 May 2011 Paper

Investigation of plasmonic resonances in the two-dimensional electron gas of an InGaAs/InP high electron mobility transistor

Justin Cleary, Robert Peale, Himanshu Saxena, Walter Buchwald

Proceedings Volume 8023, 80230X (2011) https://doi.org/10.1117/12.883480

KEYWORDS: Field effect transistors, Plasmonics, Finite element methods, Plasmons, Doping, Transistors, Terahertz radiation, Virtual reality, Solids, Gas sensors

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Proceedings Article | 26 May 2011 Paper

Plasmon resonance response to millimeter-waves of grating-gated InGaAs/InP HEMT

Nima Nader Esfahani, Christopher Fredricksen, Gautam Medhi, R. Peale, Justin Cleary, Walter Buchwald, Himanshu Saxena, Oliver Edwards

Proceedings Volume 8023, 80230R (2011) https://doi.org/10.1117/12.884005

KEYWORDS: Field effect transistors, Plasmons, Absorption, Transmittance, Terahertz radiation, Imaging systems, Extremely high frequency, Finite element methods, Semiconducting wafers, Silicon

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Proceedings Article | 13 May 2011 Paper

Cathodoluminescence study of silver and gold lamellar gratings

Janardan Nath, Casey Schwarz, Yuqing Lin, Evan Smith, R. Peale, L. Chernyak, Walter Buchwald, Jane Lee

Proceedings Volume 8031, 80312V (2011) https://doi.org/10.1117/12.884162

KEYWORDS: Silver, Modulation, Gold, Electron beams, Metals, Visibility, Sensors, Contamination, Mirrors, Spectroscopy

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Proceedings Article | 13 May 2011 Open Access

Programmatic perspectives with technical examples for THz materials characterization

Walter Buchwald

Proceedings Volume 8031, 80310F (2011) https://doi.org/10.1117/12.884599

KEYWORDS: Terahertz radiation, Plasmons, Metamaterials, Quantum optics, Spectroscopy, Sensors, Field effect transistors, Plasma, Dielectrics, Metals

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Proceedings Article | 15 September 2010 Paper

Multi-layer far-infrared component technology

Robert Peale, Justin Cleary, Walter Buchwald, Andrew Davis, Sandy Wentzel, Bill Stacy, Oliver Edwards

Proceedings Volume 7817, 78170D (2010) https://doi.org/10.1117/12.861598

KEYWORDS: Silicon, Semiconducting wafers, Mirrors, Reflectivity, Digital signal processing, Etching, Fabry–Perot interferometers, Thin films, Gold, Chemical elements

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Proceedings Article | 11 September 2010 Paper

Electrically tunable surface plasmon for THz emission, detection, and other applications

Jed Khoury, Bahareh Haji-Saeed, Walter Buchwald, Charles Woods

Proceedings Volume 7757, 77571J (2010) https://doi.org/10.1117/12.861428

KEYWORDS: Plasmons, Metals, Dielectrics, Silver, Surface plasmons, Terahertz radiation, Graphene, Optical pumping, Wave propagation, Free electron lasers

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Proceedings Article | 11 September 2010 Paper

Coupled, large-area gold nanowire arrays for nanorectenna energy conversion

Richard Osgood, Stephen Giardini, Joel Carlson, Brian Kimball, Megan Hoey, Gustavo Fernandes, Zhijun Liu, Jin Ho Kim, Jimmy Xu, Walter Buchwald

Proceedings Volume 7757, 775715 (2010) https://doi.org/10.1117/12.860174

KEYWORDS: Gold, Reflectivity, Terahertz radiation, Silicon, Polarization, Antennas, Visible radiation, Diodes, Nanowires, Nanoantennas

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Proceedings Article | 28 August 2010 Paper

Optically-electrically pumped THz source

Bahareh Haji-Saeed, Jed Khoury, Walter Buchwald, Charles Woods, Sandra Wentzell, Brian Krejca, John Kierstead

Proceedings Volume 7763, 776309 (2010) https://doi.org/10.1117/12.859704

KEYWORDS: Plasmons, Metals, Dielectrics, Silver, Terahertz radiation, Graphene, Optical pumping, Wave propagation, Free electron lasers, Surface plasmons

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Proceedings Article | 24 April 2010 Paper

Infrared surface plasmon resonance biosensor

Justin Cleary, Gautam Medhi, Robert Peale, Walter Buchwald, Oliver Edwards, Isaiah Oladeji

Proceedings Volume 7673, 767306 (2010) https://doi.org/10.1117/12.852576

KEYWORDS: Prisms, Silicon, Biosensors, Gold, Reflectivity, Surface plasmons, Absorption, Antimony, Sensors, Reflection

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Proceedings Article | 9 September 2009 Paper

Grating-gate tunable plasmon absorption in InP and GaN based HEMTs

R. Peale, H. Saxena, W. Buchwald, G. Aizin, A. Muravjov, D. Veksler, N. Pala, X. Hu, R. Gaska, M. Shur

Proceedings Volume 7467, 74670Q (2009) https://doi.org/10.1117/12.826187

KEYWORDS: Plasmons, Gallium nitride, Field effect transistors, Absorption, Terahertz radiation, Bolometers, Sensors, Transistors, Modulation, Silicon

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Proceedings Article | 1 May 2009 Paper

Tunable THz plasmon resonances in InGaAs/InP HEMT

R. Peale, H. Saxena, W. Buchwald, G. Dyer, S. J. Allen

Proceedings Volume 7311, 73110I (2009) https://doi.org/10.1117/12.818520

KEYWORDS: Terahertz radiation, Field effect transistors, Plasmons, Free electron lasers, Metals, Absorption, Sensors, Transistors, Silicon, Transmittance

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Proceedings Article | 3 September 2008 Paper

Plasmon mediated, InGaAs/InP, tunable far-IR detector

Walter Buchwald, Himanshu Saxena, Brian Krejca, Mark Roland, Robert Peale

Proceedings Volume 7082, 70820B (2008) https://doi.org/10.1117/12.793804

KEYWORDS: Plasmons, Sensors, Terahertz radiation, Field effect transistors, Electron beam lithography, Absorption, Silicon, Signal detection, Bolometers, Electron transport

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Proceedings Article | 5 May 2008 Paper

Integration of IR focal plane arrays with massively parallel processor

P. Esfandiari, P. Koskey, K. Vaccaro, W. Buchwald, F. Clark, B. Krejca, C. Rekeczky, A. Zarandy

Proceedings Volume 6940, 69402E (2008) https://doi.org/10.1117/12.777057

KEYWORDS: Sensors, Staring arrays, Indium gallium arsenide, Sapphire, Xenon, Image processing, Infrared sensors, Parallel computing, Silicon, Diffusion

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Proceedings Article | 26 September 2007 Paper

Tunable far-IR detectors/filters based on plasmons in two-dimensional electron gases in InGaAs/InP heterostructures

W. Buchwald, H. Saxena, R. Peale

Proceedings Volume 6678, 66780V (2007) https://doi.org/10.1117/12.729298

KEYWORDS: Plasmons, Sensors, Transmittance, Terahertz radiation, Heterojunctions, Field effect transistors, Optical filters, Semiconductors, Radiation effects, Photons

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Proceedings Article | 19 May 2006 Paper

Terahertz gain on inter-valence-band transitions in multilayer delta-doped p-GaAs structures

M. Dolguikh, A. Muravjov, R. Peale, D. Bliss, C. Lynch, D. Weyburne, W. Buchwald

Proceedings Volume 6212, 621206 (2006) https://doi.org/10.1117/12.664981

KEYWORDS: Gallium arsenide, Scattering, Germanium, Terahertz radiation, Laser scattering, Light scattering, Phonons, Absorption, Doping, Magnetism

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Proceedings Article | 3 October 1997 Paper

Photoconductive semiconductor switches used for ultrawideband, high-power microwave generation

Jeffrey Burger, J. Schoenberg, J. Scott Tyo, Jon Hull, Michael Abdalla, Sean Ahern, Mike Skipper, Walter Buchwald

Proceedings Volume 3158, (1997) https://doi.org/10.1117/12.279424

KEYWORDS: Switches, Switching, Antennas, Gallium arsenide, Semiconducting wafers, Semiconductors, Picosecond phenomena, Metals, Semiconductor lasers, Transmission electron microscopy

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Proceedings Article | 4 January 1995 Paper

Silicon carbide optoelectronic switches

Lawrence Kingsley, Terrence Burke, Maurice Weiner, Robert Youmans, Hardev Singh, Walter Buchwald, Joseph Flemish, Jian Zhao, K. Xie

Proceedings Volume 2343, (1995) https://doi.org/10.1117/12.198650

KEYWORDS: Switching, Silicon carbide, Laser energy, Diodes, Switches, Optoelectronics, Resistance, Electronics, Ultrafast phenomena, Energy efficiency

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Showing 5 of 31 publications

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