TERAHERTZ WAVE GENERATOR, TERAHERTZ WAVE DETECTOR, AND TERAHERTZ TIME DOMAIN SPECTROSCOPY DEVICE

摘要

Provided is a terahertz wave generator having the following structural feature in a plane perpendicular to an optical propagation direction of an optical waveguide. Specifically, 0r1r2 is satisfied, where r1 represents a radius of curvature of a terahertz wave emitting plane of a coupling member at a point A at which a line extending from the optical waveguide in the normal direction to a surface of a substrate crosses the terahertz wave emitting plane of the coupling member, and r2 represents a radius of curvature of a wavefront of a terahertz wave at the same point A. Here, r1 has a positive value when being convex in a propagation direction of the terahertz wave.