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University of Illinois at Urbana-Champaign
The scattering of high-frequency acoustic phonons in silicon and gallium arsenide
Abstract
dc:descriptionThe production and propagation of high-frequency acoustic phonons in silicon and GaAs are studied at low temperatures ($\le$2K) using the phonon imaging technique. In this technique, a heat source is provided by a focused laser beam which is raster scanned across the surface of the sample which is immersed in liquid helium. After they propagate across the sample, the acoustic phonons produced by the heat source are detected by a small superconducting detector. The spatial distribution of the ballistic phonon flux is highly anisotropic due to the phonon focusing effect.
Degree
thesis:*- Name thesis:degree_name
- Ph.D.
- Level thesis:degree_level
- Dissertation
- Discipline thesis:degree_discipline
- Physics
- Grantor
- University of Illinois at Urbana-Champaign
- Year dc:date
- 2011
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Shields, Jeffrey Allan
- Contributors dc:contributor
-
- Wolfe, J.P.
Subjects
dc:subject × 1Rights
dc:rights- Statement dc:rights
-
- Copyright 1992 Shields, Jeffrey Allan
- Language dc:language
- eng
Identifiers
dc:identifier.*- Identifier
-
AAI9215882
(UMI)AAI9215882 - OAI identifier oai:identifier
- oai:www.ideals.illinois.edu:2142/20983