Effect of substrate misorientation on the InAs/InAlAs/InP nanostructure morphology and lateral composition modulation in the InAlAs matrix


Autoria(s): Lei W; Wang YL; Chen YH; Jin P; Ye XL; Xu B; Wang ZG
Data(s)

2007

Resumo

The authors report the self-organized growth of InAs/InAlAs quantum wires on nominal (001) InP substrate and (001) InP substrates misoriented by 2 degrees, 4 degrees, and 8 degrees towards both [-110] and [110]. The influence of substrate misorientation on the structural and optical properties of these InAs/InAlAs quantum wires is studied by transmission electron microscopy and photoluminescence measurements. Compared with that grown on nominal (001) InP substrate, the density of InAs/InAlAs quantum wires grown on misoriented InP(001) substrates is enhanced. A strong lateral composition modulation effect take place in the InAlAs buffer layers grown on misoriented InP substrates with large off-cut angles (4 degrees and 8 degrees), which induces a nucleation template for the first-period InAs quantum wires and greatly improve the size distribution of InAs quantum wires. InAs/InAlAs quantum wires grown on InP (001) substrate 8 degrees off cut towards [-110] show the best size homogeneity and photoluminescence intensity. (c) 2007 American Institute of Physics.

Identificador

http://ir.semi.ac.cn/handle/172111/9578

http://www.irgrid.ac.cn/handle/1471x/64201

Idioma(s)

英语

Fonte

Lei, W (Lei, W.); Wang, YL (Wang, Y. L.); Chen, YH (Chen, Y. H.); Jin, P (Jin, P.); Ye, XL (Ye, X. L.); Xu, B (Xu, B.); Wang, ZG (Wang, Z. G.) .Effect of substrate misorientation on the InAs/InAlAs/InP nanostructure morphology and lateral composition modulation in the InAlAs matrix ,APPLIED PHYSICS LETTERS,MAR 5 2007,90 (10):Art.No.103118

Palavras-Chave #半导体材料 #INAS QUANTUM DOTS
Tipo

期刊论文