The THz spectra and analysis of Bi4Ge3O12 crystal

Yali Wang,BiHui Hou,Haiyan Wang,Guozhong Zhao,Bingxin Yang

Infrared Millimeter and Terahertz Waves（2010）

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摘要

THz time domain spectra of Bi4Ge3O12 (BGO) crystal were measured. The refractive index and power absorption function and optical dielectric function were obtained. The time domain spectrum shows resonance characteristic. There was one strong absorption band in the range of 1.5-2.3 THz. And the refractive index exist abnormal dispersion in the range. The time domain spectra characteristic of photon-phonon interaction were presented and it show that the phonon polariton arises in BGO crystal.

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关键词

THz time domain spectra,dielectric function,polaritons,bismuth compounds,frequency 1.5 THz to 2.3 THz,photon-phonon interaction,phonon polariton,resonance characteristics,refractive index,optical dispersion,Bi4Ge3O12,optical dielectric function,power absorption function,terahertz wave spectra,abnormal dispersion,phonons

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