In:
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena, American Vacuum Society, Vol. 18, No. 1 ( 2000-01-01), p. 21-24
Abstract:
We reported the optical properties of self-assembled In0.55Al0.45As quantum dots grown by molecular beam epitaxy on (001) and (n11)A/B(n=3,5)GaAs substrates. Two peaks were observed in the photoluminescence (PL) spectra from quantum dots in the (001) substrate and this suggested two sets of quantum dots different in size. For quantum dots in the high-index substrates, the PL spectra were related to the atomic-terminated surface (A or B substrate). The peaks for the B substrate surfaces were in the lower energy position than that for the (001) and A type. In addition, quantum dots in the B substrate have comparatively high quantum efficiency. These results suggested that high-index B-type substrate is more suitable for the fabrication of quantum dots than (001) and A-type substrates at the same growth condition.
Type of Medium:
Online Resource
ISSN:
1071-1023
,
1520-8567
Language:
English
Publisher:
American Vacuum Society
Publication Date:
2000
detail.hit.zdb_id:
3117331-7
detail.hit.zdb_id:
3117333-0
detail.hit.zdb_id:
1475429-0
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