Title :
Photoinduced charge-carriers in SrTiO3 crystals investigated by pump-probe THz spectroscopy
Author :
Paparo, Domenico ; Bonn, Mischa
Author_Institution :
Dipt. di Sci. Fisiche, CNR-INFM ´´Coherentia´´, Naples
Abstract :
We have investigated the photoinduced conductivity in nominally pure single crystals of SrTiO3 by means of Time Domain TeraHertz Spectroscopy. The photoconductivity is excited by fs laser pulses with photon energy suitable for generating electron-hole pairs and probed by ps single-cycle THz pulses. The photoinduced conductivity in the THz range of frequency is investigated as a function of temperature for a better understanding of the microscopic nature of the charge carriers that are generated in this material when excited by light. Preliminary results and analysis of these experiments are described in this brief report.
Keywords :
high-speed optical techniques; permittivity; photoconductivity; refractive index; strontium compounds; submillimetre wave spectra; terahertz wave spectra; SrTiO3; dielectric constant; electron-hole pairs; fs laser pulse excitation; photoinduced charge-carriers; photoinduced conductivity; pump-probe THz spectroscopy; pure single crystals; refractive index; time domain terahertz spectroscopy; Charge carriers; Conductivity; Frequency; Laser excitation; Microscopy; Optical pulse generation; Photoconductivity; Photonic crystals; Spectroscopy; Temperature distribution; SrTiO3; Time Domain THz Spectroscopy; exciton; polaron; pump-probe;
Conference_Titel :
THz Radiation: Basic Research and Applications, 2008. TERA 2008. International Workshop
Conference_Location :
Alushta
Print_ISBN :
978-1-4244-2686-7
Electronic_ISBN :
978-1-4244-2687-4
DOI :
10.1109/TERA.2008.4673826
