Work

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

Year: 2015

Type: article

Abstract: 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°∼20° 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 × 10(-6) is obtained in single ZnS NWs, which shows potential applications in nanoscale ultraviolet light source, nonlinear optical microscopy, and nanophotonic devices.

Source: Nano Letters

DOI: 10.1021/acs.nanolett.5b00607

Authors: Hongbo Hu, Kai Wang, Hua Long, Weiwei Liu, Bing Wang, Peixiang Lu

Institutions: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan Institute of Technology

Language: English

Topic: Nonlinear Optical Materials Research

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Ministry of Education of the People's Republic of China, Ministry of Science and Technology of the People's Republic of China

Awards: G2463462369, G3201356355, G3957814545