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Title: Evaluation of Au/GaAsP and Au/GaP Schottky photodiodes as radiometric detectors in the EUV

Abstract

Many applications of synchrotron radiation require an absolute measurement of photon flux. Schottky photodiodes consisting of a thin Au film deposited on GaAsP or GaP are sensitive to radiation in the extreme ultraviolet (EUV) and may be considered for use as radiometric transfer standard detectors. A radiometric detector should exhibit high quantum efficiency, spatial uniformity, resistance to radiation-induced changes, and temporal stability. While Au/GaAsP and Au/GaP Schottky photodiodes display high sensitivity, good uniformity, and resistance to radiation damage, they suffer from temporal instability. Results presented in this paper indicate that the quantum efficiency of Au/GaAsP and Au/GaP photodiodes degrades in the region from 50 nm to 150 nm during normal storage and is unstable at wavelengths as long as 254 nm. This loss of sensitivity is not substantially affected by ambient humidity and may be affected by heating the device. While useful as detectors, Au/GaAsP and Au/GaP Schottky photodiodes are not suitable for use as transfer standards in this spectral region and may not be suitable for other applications in which detector efficiency must be stable over periods longer than a week. {copyright} {ital 1996 American Institute of Physics.}

Authors:
;  [1]
  1. Electron and Optical Physics Division, Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899 (United States)
Publication Date:
OSTI Identifier:
389569
Report Number(s):
CONF-9510119-
Journal ID: RSINAK; ISSN 0034-6748; TRN: 96:027978
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 67; Journal Issue: 9; Conference: SRI `95: synchrotron radiation instrumentation symposium and the 7. users meeting for the advanced photon source (APS), Argonne, IL (United States), 16-20 Oct 1995; Other Information: PBD: Sep 1996
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; EXTREME ULTRAVIOLET RADIATION; RADIATION DETECTORS; SYNCHROTRON RADIATION; PHOTODIODES; GOLD; GALLIUM ARSENIDES; GALLIUM PHOSPHIDES; SCHOTTKY BARRIER DIODES; SEMICONDUCTOR DETECTORS; QUANTUM EFFICIENCY; STABILITY; SERVICE LIFE

Citation Formats

Vest, R E, and Canfield, L R. Evaluation of Au/GaAsP and Au/GaP Schottky photodiodes as radiometric detectors in the EUV. United States: N. p., 1996. Web. doi:10.1063/1.1147347.
Vest, R E, & Canfield, L R. Evaluation of Au/GaAsP and Au/GaP Schottky photodiodes as radiometric detectors in the EUV. United States. https://doi.org/10.1063/1.1147347
Vest, R E, and Canfield, L R. 1996. "Evaluation of Au/GaAsP and Au/GaP Schottky photodiodes as radiometric detectors in the EUV". United States. https://doi.org/10.1063/1.1147347.
@article{osti_389569,
title = {Evaluation of Au/GaAsP and Au/GaP Schottky photodiodes as radiometric detectors in the EUV},
author = {Vest, R E and Canfield, L R},
abstractNote = {Many applications of synchrotron radiation require an absolute measurement of photon flux. Schottky photodiodes consisting of a thin Au film deposited on GaAsP or GaP are sensitive to radiation in the extreme ultraviolet (EUV) and may be considered for use as radiometric transfer standard detectors. A radiometric detector should exhibit high quantum efficiency, spatial uniformity, resistance to radiation-induced changes, and temporal stability. While Au/GaAsP and Au/GaP Schottky photodiodes display high sensitivity, good uniformity, and resistance to radiation damage, they suffer from temporal instability. Results presented in this paper indicate that the quantum efficiency of Au/GaAsP and Au/GaP photodiodes degrades in the region from 50 nm to 150 nm during normal storage and is unstable at wavelengths as long as 254 nm. This loss of sensitivity is not substantially affected by ambient humidity and may be affected by heating the device. While useful as detectors, Au/GaAsP and Au/GaP Schottky photodiodes are not suitable for use as transfer standards in this spectral region and may not be suitable for other applications in which detector efficiency must be stable over periods longer than a week. {copyright} {ital 1996 American Institute of Physics.}},
doi = {10.1063/1.1147347},
url = {https://www.osti.gov/biblio/389569}, journal = {Review of Scientific Instruments},
number = 9,
volume = 67,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 1996},
month = {Sun Sep 01 00:00:00 EDT 1996}
}