Patent ID: 8148688

Claim:
A near-field terahertz wave detector, comprising: (a) a semiconductor chip whose longitudinal electrical resistance along a surface of the semiconductor chip changes due to a near-field wave generated inside the detector by a terahertz wave irradiated from outside the detector; (b) an insulating film that covers the surface of the semiconductor chip; and (c) a conductive film able to shield the terahertz wave by covering the surface of the insulating film, wherein the conductive film has an aperture whose maximum size is one digit or more smaller than the wavelength of the terahertz wave and wherein a pair of planar conductive probes are provided between the conductive film and the semiconductor chip, wherein the conductive probes are insulated from the conductive film by the insulating film, and inner tips of the conductive probes are located inside the aperture, wherein the conductive probes are located along the surface of the semiconductor chip, and a center position of the aperture coincides with a center of the pair of inner tips and an outer edge of the aperture is located outside of the pair of inner tips.