Projects per year
Abstract
We report on the influence of surface-related states on the relaxation of carriers within single (Ga,In)N/GaN quantum wells. Two identical samples that differ only in the thickness of the top GaN cap layer were studied. Photoluminescence and pump-probe measurements reveal significant variations in the quantum well integrated emission and the carrier relaxation decay times in the two samples, when probing both the ground and excited states of the wells. The variations are attributed to the presence of an efficient nonradiative relaxation channel associated with the proximity of the quantum well excitations to the surface-related states in the thin-cap sample.
Original language | English |
---|---|
Pages (from-to) | 203102-1-203102-3 |
Journal | Applied Physics Letters |
Volume | 94 |
Issue number | 20 |
DOIs | |
Publication status | Published - 18 May 2009 |
Keywords
- carrier relaxation time
- excited states
- gallium compounds
- ground states
- III-V semiconductors
- indium compounds
- photoluminescence
- semiconductor quantum wells
- surface states
- wide band gap semiconductors
Projects
- 1 Finished
-
Semiconductor-Based Hybrid Structures for Ultraviolet Micro-Devices
Dawson, M., Calvez, S., Martin, R. & Watson, I.
EPSRC (Engineering and Physical Sciences Research Council)
1/01/07 → 31/12/10
Project: Research