Exciton states in wurtzite and zinc-blende InGaN/GaN coupled quantum dots
β Scribed by Fengchun Jiang; Congxin Xia; Shuyi Wei
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 160 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0026-2692
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π SIMILAR VOLUMES
The exciton spin alignment is measured in an ensemble of self-organized cubic GaN/AlN quantum dots. By picosecond time-resolved photoluminescence experiments, we show that the exciton linear polarization does not decay with time from 20 to 300 K.
Within the framework of effective-mass approximation, exciton states confined in zinc-blende GaN/AlN quantum dot (QD) are investigated by means of a variational approach, including three-dimensional confinement of the electron and hole in the QD and finite band offsets. Numerical results show that t