Title :
THz time-domain spectroscopy of 12CaO·7Al2O3 (C12A7) containing hopping carriers
Author :
Kitagawa, J. ; Ishizaka, M. ; Harimochi, H. ; Kadoya, Y. ; Yamanishi, M. ; Matsuishi, S. ; Hosono, H.
Author_Institution :
Dept. of Quantum Matter, Hiroshima Univ., Japan
fDate :
27 Sept.-1 Oct. 2004
Abstract :
We have performed terahertz time-domain spectroscopy (THz-TDS) of carrier-doped nanoporous crystal 12CaO·7Al2O3 (C12A7) showing the Mott variable range hopping at room temperature. The frequency dependence of both the real and imaginary parts of the dielectric constant can be simply explained by considering two contributions: a phonon vibration and an AC hopping conduction with the Jonscher law generally reported up to GHz range.
Keywords :
alumina; calcium compounds; hopping conduction; nanoporous materials; permittivity; submillimetre wave spectra; 293 to 298 K; AC hopping conduction; CaOAl2O3; Jonscher law; Mott variable; THz time domain spectroscopy; carrier doped nanoporous crystal; dielectric constant; frequency dependence; phonon vibration; terahertz time domain spectroscopy; Conductors; Frequency dependence; Laser mode locking; Nanoporous materials; Optical pulse generation; Optical pulses; Phonons; Semiconductor lasers; Spectroscopy; Time domain analysis;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422132
