| EPSRC Reference: |
GR/R14620/01 |
| Title: |
Spin-Dependent Exciton Interactions In a Cold Exciton Gas |
| Principal Investigator: |
Phillips, Professor RT |
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| Department: |
Physics |
| Organisation: |
University of Cambridge |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 August 2000 |
Ends: |
31 October 2000 |
Value (£): |
7,450
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Summary on Grant Application Form |
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Exciton-exciton interaction in a dense, spin -polarised, exciton gas in an electric field leads to a splitting of the excitonic states comparable to the exciton binding energy. The splitting arises from spin-dependant exciton scattering, and detailed theoretical models have been published concerning this phenomena. One problem in making an experimental test for the models is that they presume that the exciton gas is cold, whereas previous experiments have been conducted under conditions of non-resonant excitation which invariably heats the gas. Dynamical measurements are essential, which limits the experiment to very specialised apparatus. We are curremntly studying the tuning of the splitting under resonant excitation, which can only be done in our 2 colour upconversion experiment. We aim to study the density and electric field dependences, and to verify the cross-over from cold to hot behaviour as the system is taken out of resonance.
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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 |
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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.cam.ac.uk |