| EPSRC Reference: |
GR/R15191/01 |
| Title: |
Stimulates Emission and Lasing Processes In Inga(Ai)N Quantum Well Heterostructures |
| Principal Investigator: |
Fox, Professor AM |
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| Project Partners: |
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| Department: |
Physics and Astronomy |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
30 June 2001 |
Ends: |
29 August 2004 |
Value (£): |
211,213
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| EPSRC Research Topic Classifications: |
| Optoelect. Devices & Circuits |
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Summary on Grant Application Form |
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This collaboration between Cardiff and Sheffield aims to obtain a comprehensive understanding of the stimulated emission and lasing processes in InGaN-GaN quantum wells. This physics underpins the operation of nitride laser diodes, but its present status lags seriously behind the device technology. We will carry out a systematic programme of complementary studies on custom-designed samples now available from the Central III-V Facility. This is expected to establish a strong UK presence in the competitive field of GaN laser physics, by providing a definitive body of knowledge beyond the capabilities of either group alone.At Sheffield, we will use high energy ultrafast blue pulses from a Ti:sapphire regenerative amplifier to study the carrier dynamics at high excitation densities on a femtosecond time scale. The transient absorption spectra will be recorded using white light pump-probe spectroscopy, while the simultaneous time-resolved photoluminescence spectra will be measured by up-conversion. This will allow us to study the dynamics of stimulated emission and optically-pumped lasing, together with transient field screening, carrier capture and carrier trapping effects. CW spectroscopy using p-i-n structures will be used to provide a series of well characterised samples as a reliable basis for the ultrafast studies, and for the gain studies at Cardiff.
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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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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.shef.ac.uk |