Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session T48: Electrons, Phonons, Electron-Phonon Scattering, and Phononics VI
11:30 AM–2:30 PM,
Thursday, March 17, 2022
Room: McCormick Place W-471A
Sponsoring
Units:
DCOMP DMP
Chair: Austin Minnich, California Institute of Technology
Abstract: T48.00005 : Free-carrier and defect absorption in gallium oxide*
12:42 PM–12:54 PM
Presenter:
Hartwin Peelaers
(University of Kansas)
Authors:
Hartwin Peelaers
(University of Kansas)
Arjan Singh
(Cornell University)
Okan Koksal
(Cornell University)
Nicholas Tanen
(Cornell University)
Jonathan McCandless
(Cornell University)
Debdeep Jena
(Cornell University)
Huili Grace Xing
(Cornell University)
Chris G Van de Walle
(University of California, Santa Barbara)
Farhan Rana
(Cornell University)
We performed a detailed first-principles study of these absorption processes in Ga2O3 [1,2], a material with promising applications in high-power devices and UV photodetectors. Our results elucidate the fundamental limitations of optical absorption in Ga2O3, which have subsequently been confirmed experimentally [3], and explain observed defect-related absorption [4].
*Work supported by DOE and AFOSR.
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