skip to main content

DOE PAGESDOE PAGES

Title: X-ray and optical pulse interactions in GaAs

Absorption of hard x-rays in GaAs creates excitations that can dramatically alter the propagation of optical laser pulses with photon energies near the bandgap. Measurements of optical transmission through a thin crystalline wafer of GaAs after absorption of an intense x-ray synchrotron pulse demonstrate how x-ray induced optical transparency depends on the recombination of excited conduction band electrons and valence band holes via Auger, spontaneous emission, and especially stimulated emission processes. The x-ray induced band fluorescence spectrum also reveals amplified spontaneous emission at the high x-ray fluences used, confirming the importance of stimulated emission. Finally, for laser pulses with sufficiently high fluence, the interaction of optically excited electrons with x-ray excited electrons can quench the enhanced laser transmission.
Authors:
ORCiD logo [1] ;  [1] ;  [2]
  1. Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
Grant/Contract Number:
AC02-06CH11357; SC0004078; R24GM111072
Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 122; Journal Issue: 24; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Institutes of Health (NIH). National Inst. of General Medical Sciences
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE
OSTI Identifier:
1466331
Alternate Identifier(s):
OSTI ID: 1414623

Durbin, Stephen M., Nagulu, Tharun, and DiChiara, Anthony D.. X-ray and optical pulse interactions in GaAs. United States: N. p., Web. doi:10.1063/1.5005812.
Durbin, Stephen M., Nagulu, Tharun, & DiChiara, Anthony D.. X-ray and optical pulse interactions in GaAs. United States. doi:10.1063/1.5005812.
Durbin, Stephen M., Nagulu, Tharun, and DiChiara, Anthony D.. 2017. "X-ray and optical pulse interactions in GaAs". United States. doi:10.1063/1.5005812. https://www.osti.gov/servlets/purl/1466331.
@article{osti_1466331,
title = {X-ray and optical pulse interactions in GaAs},
author = {Durbin, Stephen M. and Nagulu, Tharun and DiChiara, Anthony D.},
abstractNote = {Absorption of hard x-rays in GaAs creates excitations that can dramatically alter the propagation of optical laser pulses with photon energies near the bandgap. Measurements of optical transmission through a thin crystalline wafer of GaAs after absorption of an intense x-ray synchrotron pulse demonstrate how x-ray induced optical transparency depends on the recombination of excited conduction band electrons and valence band holes via Auger, spontaneous emission, and especially stimulated emission processes. The x-ray induced band fluorescence spectrum also reveals amplified spontaneous emission at the high x-ray fluences used, confirming the importance of stimulated emission. Finally, for laser pulses with sufficiently high fluence, the interaction of optically excited electrons with x-ray excited electrons can quench the enhanced laser transmission.},
doi = {10.1063/1.5005812},
journal = {Journal of Applied Physics},
number = 24,
volume = 122,
place = {United States},
year = {2017},
month = {12}
}