Ultrafast transient grating radiation to optical image converter
Abstract
A high sensitivity transient grating ultrafast radiation to optical image converter is based on a fixed transmission grating adjacent to a semiconductor substrate. X-rays or optical radiation passing through the fixed transmission grating is thereby modulated and produces a small periodic variation of refractive index or transient grating in the semiconductor through carrier induced refractive index shifts. An optical or infrared probe beam tuned just below the semiconductor band gap is reflected off a high reflectivity mirror on the semiconductor so that it double passes therethrough and interacts with the radiation induced phase grating therein. A small portion of the optical beam is diffracted out of the probe beam by the radiation induced transient grating to become the converted signal that is imaged onto a detector.
- Inventors:
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1163194
- Patent Number(s):
- 8879137
- Application Number:
- 13/423,498
- Assignee:
- Lawrence Livermore National Security, LLC (Livermore, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
G - PHYSICS G02 - OPTICS G02F - DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING
- DOE Contract Number:
- AC52-07NA27344
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2012 Mar 19
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Stewart, Richard E, Vernon, Stephen P, Steel, Paul T, and Lowry, Mark E. Ultrafast transient grating radiation to optical image converter. United States: N. p., 2014.
Web.
Stewart, Richard E, Vernon, Stephen P, Steel, Paul T, & Lowry, Mark E. Ultrafast transient grating radiation to optical image converter. United States.
Stewart, Richard E, Vernon, Stephen P, Steel, Paul T, and Lowry, Mark E. Tue .
"Ultrafast transient grating radiation to optical image converter". United States. https://www.osti.gov/servlets/purl/1163194.
@article{osti_1163194,
title = {Ultrafast transient grating radiation to optical image converter},
author = {Stewart, Richard E and Vernon, Stephen P and Steel, Paul T and Lowry, Mark E},
abstractNote = {A high sensitivity transient grating ultrafast radiation to optical image converter is based on a fixed transmission grating adjacent to a semiconductor substrate. X-rays or optical radiation passing through the fixed transmission grating is thereby modulated and produces a small periodic variation of refractive index or transient grating in the semiconductor through carrier induced refractive index shifts. An optical or infrared probe beam tuned just below the semiconductor band gap is reflected off a high reflectivity mirror on the semiconductor so that it double passes therethrough and interacts with the radiation induced phase grating therein. A small portion of the optical beam is diffracted out of the probe beam by the radiation induced transient grating to become the converted signal that is imaged onto a detector.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 04 00:00:00 EST 2014},
month = {Tue Nov 04 00:00:00 EST 2014}
}
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