Preparation and photoluminescence study of patterned substrate quantum wires

Author:

Wang Xiu-Ping ,Yang Xiao-Hong ,Han Qin ,Ju Yan-Ling ,Du Yun ,Zhu Bin ,Wang Jie ,Ni Hai-Qiao ,He Ji-Fang ,Wang Guo-Wei ,Niu Zhi-Chuan ,

Abstract

GaAs/AlGaAs quantum wires grown by molecular beam epitaxy on a V-groove patterned substrate was described. The cross section of scan electron microscopy (SEM) image shows that crescent-type quantum wire were formed at the V groove bottom, which is a triangle of about 60nm in width and 14nm in height. Two peaks at 793.7nm and 799.5nm of photoluminescence spectrum at 87K verified the existence of quantum wires. Theoretical calculation gives 8meV blue shift, which is proved to be casued by lateral confinement compared with quantum well of the same width.

Publisher

Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences

Subject

General Physics and Astronomy

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