Title :
The THz spectra and analysis of Bi4Ge3O12 crystal
Author :
Wang, Yali ; Hou, Bihui ; Wang, Haiyan ; Zhao, Guozhong ; Yang, Bingxin
Author_Institution :
Coll. of Mater. Sci. & Optoelectron. Technol., Grad. Univ. of Chinese Acad. of Sci., Beijing, China
Abstract :
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.
Keywords :
bismuth compounds; dielectric function; optical dispersion; phonons; polaritons; refractive index; terahertz wave spectra; Bi4Ge3O12; THz time domain spectra; abnormal dispersion; frequency 1.5 THz to 2.3 THz; optical dielectric function; phonon polariton; photon-phonon interaction; power absorption function; refractive index; resonance characteristics; Absorption; Biomedical optical imaging; Crystals; Optical refraction; Optical variables control; Photonics; Time domain analysis;
Conference_Titel :
Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010 35th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-6655-9
DOI :
10.1109/ICIMW.2010.5612465
