Open Access Nano Express

Exciton quantum confinement in nanocones formed on a surface of CdZnTe solid solution by laser radiation

Artur Medvid'1*, Natalia Litovchenko2, Aleksandr Mychko1 and Yuriy Naseka2

Author Affiliations

1 Riga Technical University, Azenes Street 14, Riga, 1048, Latvia

2 Institute of Semiconductor Physics, NAS of Ukraine, Pr. Nauki 28, Kyiv, 03028, Ukraine

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Nanoscale Research Letters 2012, 7:514  doi:10.1186/1556-276X-7-514

Published: 20 September 2012

Abstract

The investigation of surface morphology using atomic force microscope has shown self-organizing of the nanocones on the surface of CdZnTe crystal after irradiation by strongly absorbed Nd:YAG laser irradiation at an intensity of 12.0 MW/cm2. The formation of nanocones is explained by the presence of a thermogradient effect in the semiconductor. The appearance of a new exciton band has been observed after irradiation by the laser which is explained by the exciton quantum confinement effect in nanocones.

Keywords:
Nanocones; Exciton quantum confinement effect; Thermogradient effect; CdZnTe; Nd:YAG laser