室温下取向硫化镉纳米线中的受激发射。

Stimulated emissions in aligned CdS nanowires at room temperature.

作者信息

Pan Anlian, Liu Ruibin, Yang Qing, Zhu Yongchun, Yang Guozhen, Zou Bingsuo, Chen Keqiu

机构信息

Micro-Nano Technologies Research Center, Hunan University, Changsha 410082, China.

出版信息

J Phys Chem B. 2005 Dec 29;109(51):24268-72. doi: 10.1021/jp055164m.

DOI:10.1021/jp055164m

PMID:16375423

Abstract

Aligned CdS nanowires (NWs) were obtained through a simple thermal evaporation process with highly active CdS nanoparticles as the evaporation source. These NWs show prominent optical waveguides behavior under a continuous-wave (CW) laser excitation. Excitation intensity-dependent photoluminescence (PL) measurements show that these NWs exhibited both broad and supernarrow stimulated emission (lasing) under intense pulse optical excitation at room temperature. Raman scattering and time-resolved PL measurements were used to investigate the optical properties. The results indicated that the stimulated emission in these NWs involves the electron-hole plasma (EHP) and Farby-Perot (F-P) optical resonant processes at room temperature.

摘要

通过以高活性硫化镉纳米颗粒作为蒸发源的简单热蒸发过程获得了排列整齐的硫化镉纳米线（NWs）。这些纳米线在连续波（CW）激光激发下表现出显著的光波导行为。与激发强度相关的光致发光（PL）测量表明，这些纳米线在室温下的强脉冲光激发下既表现出宽带又表现出超窄受激发射（激光发射）。拉曼散射和时间分辨PL测量被用于研究光学性质。结果表明，这些纳米线中的受激发射在室温下涉及电子 - 空穴等离子体（EHP）和法布里 - 珀罗（F - P）光学共振过程。