Ultrafast spectroscopy of stimulated emission in single ZnO tetrapod nanowires

被引:23
|
作者
Djurisic, AB
Kwok, WM
Leung, YH
Chan, WK
Phillips, DL
Lin, MS
Gwo, S
机构
[1] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
[2] Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China
[3] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan
关键词
D O I
10.1088/0957-4484/17/1/041
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Stimulated emission from single ZnO tetrapod nanowires was studied by time-resolved photoluminescence (TRPL) spectroscopy. The samples were excited by a 300 fs pulse and the emission spectra collected as a function of time. The spectra exhibit a change in the position and the shape of the emission peak with time. The time evolution of the emission spectra was studied for different pump excitation fluences. The spectra exhibited a blue shift with increasing pump fluence, while for all pump fluences a red shift of the peaks with time was obtained. Possible reasons for the observed behaviour are discussed.
引用
收藏
页码:244 / 249
页数:6
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