Wavelength dependence of laser-induced phase transformations in semiconductor quantum dots

被引：27

作者：

Gajdardziska-Josifovska, M ^{[1
]}

Lazarov, V ^{[1
]}

Reynolds, J ^{[1
]}

Yakovlev, VV ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Phys, Milwaukee, WI 53201 USA

来源：

APPLIED PHYSICS LETTERS | 2001年 / 78卷 / 21期

关键词：

D O I：

10.1063/1.1347226

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study the effect of wavelength on the laser-induced phase transformation in semiconductor quantum dots. In our earlier report [Yakovlev , Appl. Phys. Lett. 76, 2050 (2000)], we discovered that a nanosecond pulse of 532 nm radiation results in a phase transformation of CdS nanocrystals from an orthorhombic to cubic phase. In this study, we find that irradiation with the pulse of a different wavelength (355 nm) results in a completely different transformation to a hexagonal wurtzite phase and a significant broadening of nanocrystal size distribution. The nanocrystal stoichiometry remained unchanged by the laser irradiation, as verified by energy dispersive x-ray spectroscopy. (C) 2001 American Institute of Physics.

引用

页码：3298 / 3300

页数：3

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