infrared millimeter terahertz waves scientific conferences

Far infrared reflectivity (FIR) and Time Domain Terahertz Transmission Spectroscopy (TTDT) have been used to study lattice vibrations in single crystalline rutile TiO2 in the 10-300K temperature range for frequencies between 0.3-20 THz (10-650 cm-1). The complex dielectric function can be determined by simultaneously fitting the FIR and TTDT data to a factorized dielectric function. The transverse A2u mode and the lowest of the three Eu modes are found to soften on cooling in a manner consistent with previous measurements of the static permittivity tensor.