| ns脉冲激光诱导制备铬掺杂ZnSe纳米粒子独特的生长以及光学特性 |
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| 引用本文： | 易家玉,;冯国英,;杨超,;张弘,;姚轲,;周寿桓.ns脉冲激光诱导制备铬掺杂ZnSe纳米粒子独特的生长以及光学特性[J].纳米科技,2014(5):37-42. |
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| 作者姓名： | 易家玉 ;冯国英 ;杨超 ;张弘 ;姚轲 ;周寿桓 |
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| 作者单位： | [1]四川大学电子信息学院,四川成都610065; [2]华北光电技术研究所,北京100015 |
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| 摘 要： | 在液相环境中，利用纳秒（ns）脉冲激光器轰击消融铬掺杂ZnSe（Cr^2＋：ZnSe）微米颗粒，制备出Cr^2＋：ZnSe纳米粒子，扫描电镜以及X射线衍射检测，结果显示，制备所得的粒子为平均尺寸为50nm的ZnSe闪锌矿结构纳米粒子。基于Cr^2＋：ZnSe纳米粒子，观察到中心波长为2180nm、阈值为0．4mJ／pulse的随机激光效应。相比于Cr^2＋：ZnSe晶体激光器，纳米粒子随机激光的中心波长发生了约170nm的蓝移，Cr^2＋：ZnSe纳米粒子的光致发光寿命也比Cr^2＋：ZnSe晶体要短。
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| 关 键 词： | Cr^2+:ZnSe 随机激光 纳米材料 中红外激光 |
Unique Growth and Optical Behaviors of Chromium Doped ZnSe Nanoparticles Induced by Ns Laser Pulse |
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| Affiliation: | YI Jia-yu, FENG Guo-ying, YANG Chao, ZHANG Hong, YAO Ke, ZHOU Shou-huan (1. Department of Opto-Electronic, Sichuan University, Chengdu 610064, China) (2. North China Research Institute of Electro-Optics, Beijing 100015, China) |
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| Abstract: | Synthesized chromium doped ZnSe nanocrystalline particles （Cr^2＋： ZnSe NCPs） by using nanosecond pulsed laser ablation of polyerystalline Cr^2＋： ZnSe micron-sized powder in liquid environment. The scanning electron micrseope and X-ray diffraction results revealed that the products were ZnSe cubic sphalerite structure with an average size around 60nm. Based on the Cr^2＋： ZnSe nanoparticles, typical random laser emissions centering at 2175 nm with a threshold of 0.4 m J/pulse were observed. Compared to the Cr^2＋： ZnSe bulk laser, the central wavelength showed about 175nm blue-shift. The photoluminescence lifetime of Cr^2＋： ZnSe NCPs was shorter than that of Cr^2＋： ZnSe bulk. |
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| Keywords: | Cr^2＋： ZnSe random laser nanomaterials mid-infrared laser |
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