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首页> 外文期刊>Optical Materials >CO_2 laser-induced precipitation of CdS_xSe_(1-x) nanoparticles in a borosilicate glass: A new approach for the localized growth of quantum dots
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CO_2 laser-induced precipitation of CdS_xSe_(1-x) nanoparticles in a borosilicate glass: A new approach for the localized growth of quantum dots

机译：CO_2激光诱导的CdS_xSe_（1-x）纳米粒子在硼硅酸盐玻璃中的沉淀：量子点局部生长的新方法

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摘要

A novel method allowing the local growth of semiconductor nanoparticles in dense silicate glasses is presented. In this method combining a continuous middle-infrared laser irradiation and a heat-treatment in open air, a transparent melt-quenched borosilicate glass containing CdS_xSe_(1-x) nanocrystals was annealed at a temperature below the softening point. Simultaneously, a continuous infrared laser irradiation at 10.6 μm was applied, acting as a thermal addition. Resonant Raman, photoluminescence and absorption spectra reveal the local growth of CdS_xSe_(1-x) nanoparticles, with a homogeneous composition and average particle radii ranging from 1.9 to 5.5 nm. These results demonstrate the feasibility of coupling a laser irradiation with an appropriate heat-treatment in order to achieve the spatial organization of nanostructures in vitreous materials.
机译：提出了一种允许在致密硅酸盐玻璃中局部生长半导体纳米粒子的新方法。在该方法中，将连续的中红外激光辐照和在露天中进行热处理相结合，在低于软化点的温度下对包含CdS_xSe_（1-x）纳米晶体的透明熔融淬火硼硅玻璃进行退火。同时，施加10.6μm的连续红外激光辐射作为热添加。共振拉曼光谱，光致发光光谱和吸收光谱揭示了CdS_xSe_（1-x）纳米粒子的局部生长，其组成均一且平均半径为1.9至5.5 nm。这些结果证明了将激光辐照与适当的热处理耦合以便在玻璃材料中实现纳米结构的空间组织的可行性。

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