Abstract-Terahertz optical properties of nonlinear optical CdSe crystals

Dexian Yan, Degang Xu, Jining Li Yuye Wang, Fei Liang, Jian Wang, Chao Yan, Hongxiang Liu, Jia Shi, Longhuang Tang, Yixin He, Kai Zhong, Zheshuai Lin, Yingwu Zhang,


https://www.sciencedirect.com/science/article/pii/S0925346718301368

We investigate the optical properties of cadmium selenide (CdSe) crystals in a wide terahertz (THz) range from 0.2 to 6 THz by THz time-domain spectroscopy (THz-TDS) and Fourier transform infrared spectroscopy (FTIR). The refractive index, absorption coefficient and transmittance are measured and analyzed. The properties are characterized by several absorption peaks which represent the relevant phonon vibrations modes. The experimental results are in agreement with the theoretical results. The dispersion and absorption properties of CdSe crystal are analyzed in THz range. These properties indicate a good potential for THz sources and THz modulated devices