Wavelength- and material-dependent absorption in GaAs and AlGaAs microcavities

Michael, C. P., Srinivasan, K., Johnson, T. J., Painter, O., Lee, K. H., Hennessy, K., Kim, H. and Hu, E. (2007) Wavelength- and material-dependent absorption in GaAs and AlGaAs microcavities. Applied Physics Letters, 90 5: 051108-1-051108-3. doi:10.1063/1.2435608

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Author Michael, C. P.
Srinivasan, K.
Johnson, T. J.
Painter, O.
Lee, K. H.
Hennessy, K.
Kim, H.
Hu, E.
Title Wavelength- and material-dependent absorption in GaAs and AlGaAs microcavities
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
Publication date 2007-01-29
Sub-type Article (original research)
DOI 10.1063/1.2435608
Open Access Status File (Publisher version)
Volume 90
Issue 5
Start page 051108-1
End page 051108-3
Total pages 3
Place of publication College Park, MD, U.S.A
Publisher American Institute of Physics
Language eng
Subject 02 Physical Sciences
Formatted abstract
The quality factors of modes in nearly identical GaAs and Al0.18Ga0.82As microdisks are tracked over three wavelength ranges centered at 980, 1460, and 1600 nm, with quality factors measured as high as 6.62×105 in the 1600 nm band. After accounting for surface scattering, the remaining loss is due to sub-band-gap absorption in the bulk and on the surfaces. The observed absorption is, on average, 80% greater in AlGaAs than in GaAs and is 540% higher in both materials at 980 nm than at 1600 nm.
Keyword Aluminium compounds
Gallium arsenide
III-V semiconductors
Surface scattering
Energy gap
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 53 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 52 times in Scopus Article | Citations
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Created: Thu, 21 Jan 2010, 15:06:31 EST by Jon Swabey on behalf of Faculty of Science