InAs avalanche photodiodes for X-ray detection

R. B. Gomes, C. H. Tan, Pin Jern Ker, J. P.R. David, J. S. Ng

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this work we present the first InAs avalanche photodiode (APD) for X-ray detection and demonstrate the improved energy resolution due to its avalanche gain. Under the radiation from a 55Fe radioactive X-ray source the full width at half maximum (FWHM) at 5.9 keV peak reduces as the avalanche gain increases. The FWHM drops from 2.02 keV at an avalanche gain of 1.58 to 950 eV at a gain of 5.3. The FWHM was larger than the fano-limited value due to the noise from accompanying electronics and the increased leakage current introduced by the diode packaging.

Original languageEnglish
Article numberP12005
JournalJournal of Instrumentation
Volume6
Issue number12
DOIs
Publication statusPublished - 01 Dec 2011

Fingerprint

Avalanche Photodiode
Avalanche photodiodes
Full width at half maximum
avalanches
photodiodes
Avalanche
X rays
x rays
Leakage currents
Leakage Current
Packaging
Diodes
Electronic equipment
packaging
Diode
Radiation
leakage
diodes
Electronics
radiation

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Mathematical Physics

Cite this

Gomes, R. B. ; Tan, C. H. ; Ker, Pin Jern ; David, J. P.R. ; Ng, J. S. / InAs avalanche photodiodes for X-ray detection. In: Journal of Instrumentation. 2011 ; Vol. 6, No. 12.
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InAs avalanche photodiodes for X-ray detection. / Gomes, R. B.; Tan, C. H.; Ker, Pin Jern; David, J. P.R.; Ng, J. S.

In: Journal of Instrumentation, Vol. 6, No. 12, P12005, 01.12.2011.

Research output: Contribution to journalArticle

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