| EPSRC Reference: |
GR/N21888/01 |
| Title: |
GAINP/ALGAINP QUANTUM DOT LASERS |
| Principal Investigator: |
Smowton, Professor PM |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
School of Physics and Astronomy |
| Organisation: |
Cardiff University |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
12 February 2001 |
Ends: |
11 August 2004 |
Value (£): |
170,382
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| EPSRC Research Topic Classifications: |
| Optoelect. Devices & Circuits |
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| EPSRC Industrial Sector Classifications: |
| Electronics |
No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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The aim of the project is to develop short wavelength quantum dot lasers for operation at the technologically important wavelengths in the red part of the spectrum. This will make use of a new quantum dot material system of GaInP growth in AlGaInP. A complementary aim is to gain further insight into the physics of low-dimensional solids as applied to seminconductor lasers and to produce a detailed model of GaInP/AlGaInP quantum dot lasers to allow design optimisation for future applications.Although conventional quantum well lasers operating between 690and 630nm have many applications (including optical information storage, plastic fibre communications and photodynamic therapy), their use is restricted by high threshold current, large temperature sensitivity and small differential gain. Although progress has been made by careful optimisation of device designs the prospect of using quantum dot structures in the GaInP material system, suggested by recent work in Cardiff, offers an opportunity to attachk these limitations at a more fundamental level. Material grown by the Stranski-Krastinov process also extends the upper wavelength limit beyond that obtainable with GaInP quantum wells. This larger range encompasses wavelengths of interest for photodynamic therapy that lie between those currently available using GaInP (<690nm) and GaAs (>740nm).
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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.cf.ac.uk |