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Open Access Nano Express

InGaAs Quantum Well Grown on High-Index Surfaces for Superluminescent Diode Applications

Zhenhua Li1, Jiang Wu2*, Zhiming M Wang1, Dongsheng Fan2, Aqiang Guo1, Shibing Li2, Shui-Qing Yu2, Omar Manasreh12 and Gregory J Salamo12

Author affiliations

1 Arkansas Institute For Nanoscale Materials Science and Engineering, University of Arkansas, Fayetteville, AR, 72701, USA

2 Department of Electrical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA

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Citation and License

Nanoscale Research Letters 2010, 5:1079-1084  doi:10.1007/s11671-010-9605-2

Published: 22 April 2010

Abstract

The morphological and optical properties of In0.2Ga0.8As/GaAs quantum wells grown on various substrates are investigated for possible application to superluminescent diodes. The In0.2Ga0.8As/GaAs quantum wells are grown by molecular beam epitaxy on GaAs (100), (210), (311), and (731) substrates. A broad photoluminescence emission peak (~950 nm) with a full width at half maximum (FWHM) of 48 nm is obtained from the sample grown on (210) substrate at room temperature, which is over four times wider than the quantum well simultaneously grown on (100) substrate. On the other hand, a very narrow photoluminescence spectrum is observed from the sample grown on (311) with FWHM = 7.8 nm. The results presented in this article demonstrate the potential of high-index GaAs substrates for superluminescent diode applications.

Keywords:
Photoluminescence; Quantum well; High-index surfaces; Superluminescent diode; Atomic force microscopy