Optical property and spectroscopy studies on &#946;-ZnS nanoparticles in the terahertz range

Yu-Ping Yang; Xiu-min Wang; Bin Zou; Shuai Feng; Xiao Chen; Wen-zhong Wang

doi:10.1117/12.834691

4 August 2009 Optical property and spectroscopy studies on β-ZnS nanoparticles in the terahertz range

Yu-Ping Yang, Xiu-min Wang, Bin Zou, Shuai Feng, Xiao Chen, Wen-zhong Wang

Proceedings Volume 7385, International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications; 73850Q (2009) https://doi.org/10.1117/12.834691
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

A simple wet-chemical route has been employed to synthesize β-ZnS nanoparticles with diameter of ca.15-20 nm. The far-infrared characteristics of β-ZnS nanoparticles are investigated by terahertz time-domain spectroscopy (THz-TDS) over the frequency range from 0.3 to 2.5 THz. The observed results show two obvious absorption features at 1.44 and 1.72 THz, which give rise to different vibration modes compared to the bulk ZnS. The theoretical calculation has been carried out for better understanding the vibration behaviors by using of density functional theory (DFT) with GAUSSIAN 03 software package. The simulated absorption spectrum was consistent with the experimental data. The results reveal that the two absorption features are mainly ascribed to different vibration modes caused by the surface atoms.

Citation Download Citation

Yu-Ping Yang, Xiu-min Wang, Bin Zou, Shuai Feng, Xiao Chen, and Wen-zhong Wang "Optical property and spectroscopy studies on β-ZnS nanoparticles in the terahertz range", Proc. SPIE 7385, International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications, 73850Q (4 August 2009); https://doi.org/10.1117/12.834691

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