| EPSRC Reference: |
GR/N20997/01 |
| Title: |
STUDIES OF FUNDAMENTAL PHYSICAL PROCESSES IN INAS-(AL) GAAS SELF-ASSEMBLED QUANTUM DOTS |
| Principal Investigator: |
Mowbray, Professor D |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Physics and Astronomy |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 January 2001 |
Ends: |
31 December 2003 |
Value (£): |
243,245
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| EPSRC Research Topic Classifications: |
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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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We propose a detailed study of fundamental physical processes in self-assembled InAs-(A1)GaAs quantum dots (QDs). Using recently developed equipment and samples we will perform a comprehensive optical spectroscopic study of single QDs, thereby eliminating inhomogeneous broadening effects. The aim will be to obtain a full understanding of the single particle energy level structure, carrier capture and relaxation mechanisms and many carrier effects (exchange and correlation effects, band gap renormalisation, shake-up processes) using the techniques of PL, PLE, PC and magneto-optics. Ultra-high resolution spectroscopy of single QDs will be performed using a Fabry-Perot etalon. Natural line widths will be determined, permitting a study of carrier scattering, dephasing and relaxation mechanisms. Electronic coupling between vertically stacked QDs will be investigated. Conventional spectroscopy on large QD ensembles will be used to determine the energy level structure and carrier escape mechanisms in InAs-AlGaAs QDs as a function of the size of the confinement potential. In addition, conventional spectroscopy will also be used to determine the nature of wavefunction anisotrophies and valence band mixing, and as a probe of QD structural properties.
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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 |