| EPSRC Reference: |
GR/K55547/01 |
| Title: |
GASB-BASED OPTICAL DETECTORS OPERATING ABOVE 2UM FOR ENVIRONMENTAL GAS SENSING |
| Principal Investigator: |
Haywood, Professor S |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Electronic and Electrical Engineering |
| Organisation: |
UCL |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1994 |
Ends: |
30 April 1996 |
Value (£): |
89,443
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| EPSRC Research Topic Classifications: |
| Materials Synthesis & Growth |
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Summary on Grant Application Form |
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The aim of this project is to develop efficient, wavelength specific, semiconductor detectors for use in the optical sensing of environmental gases. Primarily, we shall use GaInSb/GaSb MQW and GaInSb bulk layers. The bandgap of these structures can be varied from 1.6-7um by changing the composition and/or well-width. Both Schottky and p-i-n diode structures will be investigated, the former mainly with bulk layers. We will study the use of a Fabry-Perot cavity to enhance detection sensitivity and also to give wavelength selectivity. The quantum confined Stark effect can be used in conjunction with an a.c. signal to switch a MQW detector on and off a gas absorption line. Monitoring the in-phase change in photocurrent could offer a further means of achieving enhanced sensitivity at a particular wavelength. GaSb/InAs detectors operating at 4-10um may also be studied.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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