Patent ID: 8405031

Claim:
A terahertz wave generator for generating a terahertz wave, comprising: a generating layer for generating carriers by incident excitation light, wherein the excitation light reflected by the generating layer reenters the generating layer; a waveguide layer for permitting the excitation light to pass through; and a first confinement layer for making the excitation light reflected by the generating layer to reenter the generating layer, wherein: the generating layer, the wave guide layer, and the first confinement layer are laminated in the stated order, the generating layer is formed of a photoconductive semiconductor, the waveguide layer is formed of a material that permits the excitation light entering the generating layer and a terahertz wave generated by the excitation light entering the generating layer to pass through, and the first confinement layer is formed of a material that reflects the excitation light propagating in the waveguide layer and the terahertz wave propagating in the waveguide layer.