X-ray and optical pulse interactions in GaAs
Abstract
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:
-
[1];
- Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Institutes of Health (NIH). National Inst. of General Medical Sciences
- OSTI Identifier:
- 1466331
- Alternate Identifier(s):
- OSTI ID: 1414623
- Grant/Contract Number:
- AC02-06CH11357; SC0004078; R24GM111072
- Resource 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)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE
Citation Formats
Durbin, Stephen M., Nagulu, Tharun, and DiChiara, Anthony D. X-ray and optical pulse interactions in GaAs. United States: N. p., 2017.
Web. doi:10.1063/1.5005812.
Durbin, Stephen M., Nagulu, Tharun, & DiChiara, Anthony D. X-ray and optical pulse interactions in GaAs. United States. https://doi.org/10.1063/1.5005812
Durbin, Stephen M., Nagulu, Tharun, and DiChiara, Anthony D. Fri .
"X-ray and optical pulse interactions in GaAs". United States. https://doi.org/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 = {Fri Dec 22 00:00:00 EST 2017},
month = {Fri Dec 22 00:00:00 EST 2017}
}
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