| EPSRC Reference: |
GR/L81697/01 |
| Title: |
A STUDY OF THE DYNAMICAL PROCESSES IN SEMICONDUCTOR QUANTUM WIRE AND DOT STRUCTURES |
| Principal Investigator: |
Dawson, Professor P |
| Other Investigators: |
|
| Researcher Co-Investigators: |
|
| Project Partners: |
|
| Department: |
Physics |
| Organisation: |
UMIST |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 May 1998 |
Ends: |
30 April 2001 |
Value (£): |
180,216
|
| EPSRC Research Topic Classifications: |
| Materials Characterisation |
|
|
| EPSRC Industrial Sector Classifications: |
|
| Related Grants: |
|
| Panel History: |
|
|
Summary on Grant Application Form |
|
By the use of naturally occurring growth phenomena it is now possible to produce quantum wires and dots whose size is sufficiently small to produce a significant modification to the density of states functions. It is predicted, but as yet not unambiguously observed, that such a modification will inhibit the carrier/carrier and carrier/phonon scattering processes that are responsible for fast cooling of a non equilibrium carrier distribution. If this is so we anticipate the modified scattering processes will also influence the low temperature recombination dynamics. We propose to investigate such phenomena using photoluminescence time secay measurements. The modified density of states functions should also lead to improved threshold current densities for semiconductor lasers. If this prediction is to be realised in practice then the growth of layers exhibiting high quantum efficiencies at room temperature is essential. At high temperatures we expect not only will the temperature dependence of the rates be modified but also the roles of thermally excited carrier escape and non radiative recombination due to killer centres. Thus we will extend our time decay measurements to determine the suitability of quantum wires and dots for inclusion in device structures.
|
|
Key Findings |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Potential use in non-academic contexts |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Impacts |
|
| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
|
| Date Materialised |
|
|
|
|
Sectors submitted by the Researcher |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
| Project URL: |
|
| Further Information: |
|
| Organisation Website: |
|