Dr. George T. Wang Profile

Dr. George T. Wang

Principal Member of Technical Staff at Sandia National Labs

SPIE Involvement:

Conference Program Committee | Author

Publications (16)

Proceedings Article | 5 October 2023 Presentation

Enabling electrical and magnetic properties by tailoring dimensions

Keshab Sapkota, Ping Lu, Sadhvikas Addamane, Douglas Medlin, Wenyong Wang, George Wang

Proceedings Volume PC12651, PC126510F (2023) https://doi.org/10.1117/12.2677833

KEYWORDS: Magnetism, Oxides, Nanowires, Nanomaterials, Materials properties, Zinc oxide, Polarons, Oxygen, Nanostructures, Metals

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Proceedings Article | 24 March 2023 Presentation

On-chip, ultra-low voltage GaN vacuum nanoelectronics

George Wang, Keshab Sapkota, A. Alec Talin, Francois Leonard, Brendan Gunning, Gyorgy Vizkelethy

Proceedings Volume PC12430, PC124300F (2023) https://doi.org/10.1117/12.2647038

KEYWORDS: Gallium nitride, Nanoelectronics, Solid state electronics, Vacuum tubes, Silicon, Pollution control, Packaging, Metals, Instrument modeling, Energy efficiency

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Proceedings Article | 3 October 2022 Presentation

GaN vacuum nanoelectronic devices

George Wang, Keshab Sapkota, A. Alec Talin, Francois Leonard, Gyorgy Vizkelethy, Brendan Gunning

Proceedings Volume PC12200, PC1220001 (2022) https://doi.org/10.1117/12.2638041

KEYWORDS: Gallium nitride, Nanoelectronics, Transistors, Reliability, Instrument modeling, Diodes

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Proceedings Article | 3 August 2021 Presentation

Low refractive cladding in III-nitride photonics

Ganapathi Subramania, Nicholas Karl, Keshab Sapkota, George Wang, Igal Brener, Zachary Meinelt, Daniel Feezell

Proceedings Volume 11796, 117960C (2021) https://doi.org/10.1117/12.2596419

KEYWORDS: Cladding, Photonics, Gallium nitride, Refractive index, Photonic crystals, Nanowires, Laser optics, Etching, Electrochemical etching, Visible radiation

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Proceedings Article | 6 March 2021 Presentation

Exploring AlGaN nanostructures fabricated via chemical wet etching

Barbara Kazanowska, Keshab Sapkota, Brendan Gunning, Kevin Jones, George Wang

Proceedings Volume 11686, 1168625 (2021) https://doi.org/10.1117/12.2582551

KEYWORDS: Etching, Wet etching, Nanostructures, Nanolithography, Nanowires, Light emitting diodes, Silicon, Sensors, Optoelectronics, Laser applications

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SPIE Journal Paper | 6 March 2021 Open Access

Photothermal alternative to device fabrication using atomic precision advanced manufacturing techniques

Aaron Katzenmeyer, Sanja Dmitrovic, Andrew Baczewski, Quinn Campbell, Ezra Bussmann, Tzu-Ming Lu, Evan Anderson, Scott Schmucker, Jeffrey Ivie, Deanna Campbell, Daniel Ward, David Scrymgeour, George Wang, Shashank Misra

JM3, Vol. 20, Issue 01, 014901, (March 2021) https://doi.org/10.1117/12.10.1117/1.JMM.20.1.014901

KEYWORDS: Hydrogen, Silicon, Scanning tunneling microscopy, Optical lithography, Temperature metrology, Lithography, Pulsed laser operation, Semiconductor lasers, Manufacturing, Microelectronics

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Proceedings Article | 5 March 2021 Presentation

High-performance GaN nanoscale vacuum electron devices in air

Keshab Sapkota, A. Alec Talin, Francois Leonard, Barbara Kazanowska, Brendan Gunning, Kevin Jones, George Wang

Proceedings Volume 11686, 116861D (2021) https://doi.org/10.1117/12.2583118

KEYWORDS: Gallium nitride, Solid state electronics, Silicon, Packaging, Nanoelectronics, Metals, Instrument modeling, Electron transport, Diodes, Vacuum tubes

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Proceedings Article | 21 August 2020 Presentation

GaN vacuum nanoelectronic devices

George Wang, Keshab Sapkota, Barbara Kazanowska, A. Alec Talin, Francois Leonard, Brendan Gunning, Kevin Jones

Proceedings Volume 11465, 114650O (2020) https://doi.org/10.1117/12.2570577

KEYWORDS: Gallium nitride, Nanoelectronics, Solid state electronics, Vacuum tubes, Electron transport, Packaging, Silicon, Metals, Diodes, Instrument modeling

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Proceedings Article | 23 March 2020 Presentation + Paper

Photothermal alternative to device fabrication using atomic precision advanced manufacturing techniques

A. Katzenmeyer, S. Dmitrovic, A. Baczewski, E. Bussmann, T.-M. Lu, E. Anderson, S. Schmucker, J. Ivie, D. Campbell, D. Ward, G. Wang, S. Misra

Proceedings Volume 11324, 113240Z (2020) https://doi.org/10.1117/12.2551455

KEYWORDS: Hydrogen, Silicon, Scanning tunneling microscopy, Pulsed laser operation, Optical lithography, Manufacturing, Lithography, Phosphorus, Absorption

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Proceedings Article | 25 September 2017 Presentation

Ultrafast carrier capture and Auger recombination in individual III-nitride nanowires (Conference Presentation)

Stephane Boubanga Tombet, Jeremy Wright, Ping Lu, Michael R. Williams, Changyi Li, George Wang, Rohit Prasankumar

Proceedings Volume 10345, 1034505 (2017) https://doi.org/10.1117/12.2273227

KEYWORDS: Ultrafast phenomena, Carrier dynamics, Optical microscopy, Semiconductors, Quantum wells, Heterojunctions, Optoelectronic devices, Solid state lighting, Nanomaterials, Gallium nitride

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Proceedings Article | 11 November 2016 Presentation

III-Nitride nanowire lasers: fabrication and control of optical properties (Conference Presentation)

George Wang

Proceedings Volume 9924, 992402 (2016) https://doi.org/10.1117/12.2239450

KEYWORDS: Nanowires, Heterojunctions, Nanolithography, Optical properties, Polarization control, Etching, Beam controllers, Control systems, Wavelength tuning, Beam shaping

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Proceedings Article | 15 February 2012 Paper

Gallium-nitride-based logpile photonic crystals for visible lighting

G. Subramania, Q. Li, Y.-J. Lee, J. Figiel, C. Sanchez, G. Wang, A. Fischer, R. Biswas

Proceedings Volume 8249, 82490V (2012) https://doi.org/10.1117/12.915778

KEYWORDS: Gallium nitride, Photonic crystals, Refractive index, Light emitting diodes, Silica, Light sources and illumination, Solid state lighting, Electromagnetism, Visible radiation, Crystals

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Proceedings Article | 6 February 2012 Paper

Top-down fabrication of GaN-based nanorod LEDs and lasers

George Wang, Qiming Li, Jonathan Wierer, Jeffrey Figiel, Jeremy Wright, Ting S. Luk, Igal Brener

Proceedings Volume 8278, 827816 (2012) https://doi.org/10.1117/12.909377

KEYWORDS: Light emitting diodes, Gallium nitride, Etching, Nanolithography, Wet etching, Plasma etching, Heterojunctions, Anisotropic etching, Nanorods, Nanowires

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Proceedings Article | 9 February 2011 Paper

III-nitride nanowires: novel materials for solid-state lighting

George Wang, Qiming Li, Jianyu Huang, A. Alec Talin, Andrew Armstrong, Prashanth Upadhya, Rohit Prasankumar

Proceedings Volume 7954, 79540T (2011) https://doi.org/10.1117/12.872776

KEYWORDS: Gallium nitride, Indium gallium nitride, Solid state lighting, Transmission electron microscopy, Light emitting diodes, Etching, Heterojunctions, Metalorganic chemical vapor deposition, Nanowires, Nanorods

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Proceedings Article | 28 August 2010 Paper

III-nitride nanowires: growth, properties, and applications

George Wang, Qiming Li, Jianyu Huang, A. Alec Talin, Yong Lin, Ilke Arslan, Andrew Armstrong, Prashanth Upadhya, Rohit Prasankumar

Proceedings Volume 7768, 77680K (2010) https://doi.org/10.1117/12.859404

KEYWORDS: Gallium nitride, Nickel, Transmission electron microscopy, Sapphire, Scanning electron microscopy, Heterojunctions, Aluminum nitride, Scanning transmission electron microscopy, Metalorganic chemical vapor deposition, Nanowires

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Proceedings Article | 3 September 2009 Paper

Ultrafast carrier dynamics in semiconductor nanowires

R. Prasankumar, P. Upadhya, Q. Li, N. Smith, S. G. Choi, A. Azad, D. Talbayev, G. Wang, A. Fischer, J. Hollingsworth, S. Trugman, S. Picraux, A. Taylor

Proceedings Volume 7406, 74060E (2009) https://doi.org/10.1117/12.828022

KEYWORDS: Germanium, Semiconductors, Gallium nitride, Picosecond phenomena, Ultrafast laser spectroscopy, Carrier dynamics, Optical spectroscopy, Nanostructures, Ultrafast measurement systems, Nanowires

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