PHONON POLARITON WAVEGUIDE COUPLED APPARATUS FOR GENERATING TERAHERTZ WAVE

摘要

PROBLEM TO BE SOLVED: To provide a phonon polariton waveguide coupled apparatus for generating a variable frequency terahertz wave, which is coupled with a waveguide and with which a terahertz electromagnetic wave is highly efficiently taken out.;SOLUTION: The apparatus for generating the terahertz wave comprises a GaP crystal, two pump light sources generating a wave with 1.0 μm or longer wavelength and a means to minutely vary an angle between respective beams of the two pump light sources from a parallel direction. By disposing a terahertz waveguide, in close proximity or in direct connection, on a terahertz wave output surface of the GaP crystal, a terahertz wave output with a frequency equal to the difference frequency of them is obtained. Thereby the terahertz wave is highly efficiently taken out and further is transmitted while being confined in the waveguide. Consequently measurement and diagnosis with the terahertz wave are extremely easily carried out.;COPYRIGHT: (C)2005,JPO&NCIPI