Precise Determination of the Crystallographic Orientations in Single ZnS Nanowires by Second-Harmonic Generation Microscopy

被引：74

作者：

Hu, Hongbo ^{[1
,2
]}

Wang, Kai ^{[1
,2
]}

Long, Hua ^{[1
,2
]}

Liu, Weiwei ^{[1
,2
]}

Wang, Bing ^{[1
,2
]}

Lu, Peixiang ^{[1
,2
,3
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China

[3] Wuhan Inst Technol, Lab Opt Informat Technol, Wuhan 430205, Peoples R China

来源：

NANO LETTERS | 2015年 / 15卷 / 05期

基金：

中国国家自然科学基金;

关键词：

SHG; ZnS nanowire; polarization-dependent; crystallographic orientations; nanoscale light source; NANOBELTS; NANOPARTICLES; NANOCRYSTALS; FABRICATION;

D O I：

10.1021/acs.nanolett.5b00607

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the systematical study of the second-harmonic generation (SHG) in single zinc sulfide nanowires (ZnS NWs). The high-quality ZnS NWs with round cross-section were fabricated by chemical vapor deposition method. The transmission electron microscopy images show that the actual growth axis has a deviation angle of 0 degrees similar to 20 degrees with the preferential growth direction [120], which leads to the various polarization-dependent SHG response patterns in different individual ZnS NWS. The SHG response is quite sensitive to the orientations of c axis as well as the (100) and (010), crystal-axis of ZnS NWS; thus, all the three crystal-axis orientations of ZnS NWs are precisely determined by the SHG method. A high SHG conversion efficiency of 7 X 10(-6) is obtained in single ZnS NW, which shows potential applications in nanoscale ultraviolet light source, nonlinear optical microscopy, and nanophotonic devices.

引用

页码：3351 / 3357

页数：7

共 38 条

[1] Ultrafast second-harmonic generation spectroscopy of GaN thin films on sapphire [J].