| EPSRC Reference: |
GR/N18376/01 |
| Title: |
TOWARDS A NOVEL HYBRID GASB/PBSE/GASB MID-INFRARED DIODE LASER |
| Principal Investigator: |
Krier, Professor A |
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| Department: |
Physics |
| Organisation: |
Lancaster University |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
05 June 2000 |
Ends: |
04 December 2001 |
Value (£): |
52,609
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| EPSRC Research Topic Classifications: |
| Optoelect. Devices & Circuits |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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The commercial application of mid-infrared diode lasers for high sensitivity gas analysis is currently limited by their poor quantum efficiency. In III-V compounds Auger recombination dominated at room temperature and so cryogenic of thermo-electric cooling becomes necessary. Iv-VI compounds by comparison have a mirror band structure and potentially lower Auger rates which promise higher laser operating temperatures. But these materials suffer from interface & Shockley-Read recombination due to poor substrate quality.Within the present proposal we now wish to build on our existing expertise and pursue complementary research towards a novel hybrid GaSb PbSe laser which combines the superior crystalline perfection of III-V substrates and well developed materials technology, with the potentially higher intrinsic quantum efficiency of the IV-VI compounds.Epitaxial growth and laser fabrication will be done at Lancaster. A prototype hybrid laser operating at room temperature near 4um will be demonstrated. Auger rates will be measured and compared with data on existing III-V structures. Modelling and gain measurements will be carried out in Cardiff to elucidate the details of the proposed structures. Pump-probe measurements at FELIX (via Heriot-Watt) will be carried out to determine Auger rates. We note that there is currently no UK research into Pb-salt IV-VI lasers.
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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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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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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.lancs.ac.uk |