Stimulated emissions in aligned CdS nanowires at room temperature.
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.
Pan
Anlian
A
Micro-Nano Technologies Research Center, Hunan University, Changsha 410082, China.
Liu
Ruibin
R
Yang
Qing
Q
Zhu
Yongchun
Y
Yang
Guozhen
G
Zou
Bingsuo
B
Chen
Keqiu
K