Optical properties of Zn(S,Se) sawtooth superlattices grown by atomic layer epitaxy
作者:
Hiroyuki Fujiwara,
Toshiyuki Nabeta,
Isamu Shimizu,
Takashi Yasuda,
期刊:
Journal of Applied Physics
(AIP Available online 1996)
卷期:
Volume 80,
issue 4
页码: 2363-2366
ISSN:0021-8979
年代: 1996
DOI:10.1063/1.363070
出版商: AIP
数据来源: AIP
摘要:
‘‘Sawtooth’’ superlattices of Zn(S,Se) were grown on GaAs substrates by a layer‐by‐layer atomic epitaxy growth technique. Larger scale variations in band gap were introduced by systematically varying the ratio of ZnS and ZnSe thickness over greater distance scales. These larger scale variation were themselves repeated in order to produce a superlattice in which the band gap had a sawtooth shaped profile. The structure and optical properties of these new materials were characterized by x‐ray diffraction and photoluminescence measurement. The x‐ray diffraction spectra showed satellite peaks corresponding to the large scale variations in structure. The strong blue photoluminescence peaks were observed and consistent with hole trapping in the sawtooth potential wells. ©1996 American Institute of Physics.
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