Physical model of the infrared dielectric function of zinc sulfide

作者：Liu, Huasong; Li, Shida; Yang, Xiao; Liu, Dandan; Ji, Yiqin^*; Zhang, Feng; Chen, Deying

来源：Journal of Applied Physics, 2017, 122(22): 223109.

DOI：10.1063/1.5016863

• SPECTRA

We apply the Gaussian-oscillator model of the infrared dielectric function of ZnS materials prepared by hot pressing (HP) and chemical vapor deposition (CVD). Chemical factor analysis of the 700 to 1300 cm(-1) spectral range shows 3 oscillators in the HP material and 4 in that prepared by CVD. The origin of these oscillators is identified. In both materials, high-order transverse-optical (TO) and longitudinal-acoustic (LA) vibration modes are excited. In HP-ZnS, the four oscillators are related to the 3TO, 1TO+2LA, 3LA, and 4LA modes. Only the first three are found in the CVD material. These results clarify the physical mechanisms of lattice absorption of ZnS in this spectral range. Published by AIP Publishing.

• 出版日期2017-12-14
• 单位哈尔滨工业大学