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Mode-locking and other nonlinear effects in CdS Phonon Masers Smeaton, Melvin Douglas
Abstract
The nonlinear theory of acoustic amplification in piezoelectric semiconductors has been applied to the CdS phonon maser, to demonstrate that mode-locking In such a device can be predicted as a consequence of its structure and nonlinear properties of the acousto-electric amplifying mechanism. The first direct evidence of mode-locking in the phonon maser has been provided by applying optical processing techniques to signals obtained from laser diffraction. A new and powerful technique for the analysis of optical signals, involving a combination of spatial and temporal filtering, has been developed. Further application of optical processing has allowed the first direct observation of acoustically induced space charge gratings in CdS. Proper exploitation of the methods outlined should give insight into the underlying physical processes. In addition to the optical experiments, data has been presented that demonstrates the existence of two new photovoltaic effects in CdS. The resulting photovoltages are several orders of magnitude larger than those produced by known photovoltaic effects. As yet, the physical processes involved are not properly understood.
Item Metadata
Title |
Mode-locking and other nonlinear effects in CdS Phonon Masers
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1976
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Description |
The nonlinear theory of acoustic amplification in piezoelectric semiconductors has been applied to the CdS phonon maser, to demonstrate that mode-locking In such a device can be predicted as a consequence of its structure and nonlinear properties of the acousto-electric amplifying mechanism. The first direct evidence of mode-locking in the phonon maser has been provided by applying optical processing techniques to signals obtained from laser diffraction. A new and powerful technique for the analysis of optical signals, involving a combination of spatial and temporal filtering, has been developed.
Further application of optical processing has allowed the first direct observation of acoustically induced space charge gratings in CdS. Proper exploitation of the methods outlined should give insight into the underlying physical processes.
In addition to the optical experiments, data has been presented that demonstrates the existence of two new photovoltaic effects in CdS. The resulting photovoltages are several orders of magnitude larger than those produced by known photovoltaic effects. As yet, the physical processes involved are not properly understood.
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Genre | |
Type | |
Language |
eng
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Date Available |
2010-02-21
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0085176
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
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Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.