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Optical Fabrication of Semiconductor Single-Crystalline Microspheres in Superfluid Helium

Published online by Cambridge University Press:  27 January 2014

Shinya Okamoto ,
Satoshi Ichikawa ,
Yosuke Minowa  and
Masaaki Ashida
Shinya Okamoto
Affiliation:
Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyamacho, Toyonaka, Osaka 560-8531, Japan
Satoshi Ichikawa
Affiliation:
Institute for NanoScience Design, Osaka University, 1-3 Machikaneyamacho, Toyonaka, Osaka 560-8531, Japan
Yosuke Minowa
Affiliation:
Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyamacho, Toyonaka, Osaka 560-8531, Japan
Masaaki Ashida
Affiliation:
Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyamacho, Toyonaka, Osaka 560-8531, Japan
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Abstract

We successfully fabricated semiconductor microspheres of ZnO, ZnSe, etc., by laser ablation in superfluid helium and investigated their morphology and optical properties. Time-resolved photoluminescence spectroscopy in ultraviolet region of single ZnO microspheres shows luminescence spectra with mode structures and remarkable reduction of the luminescence decay time compared to that of polycrystals or non-spherical microparticles. This indicates strong light-matter interaction due to efficient light-confinement in the ZnO microspheres. In addition, the fabricated ZnSe microspheres also show the photoluminescence spectra with typical mode structures indicating their high sphericity.

Keywords

laser ablationmicrostructureoptical properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1635: Symposium T – Compound Semiconductor Materials and Devices , 2014 , pp. 103 - 108
Copyright
Copyright © Materials Research Society 2014 

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