Patent ID: 8969805
Filing Date: 2015-03-03
Classification: G01N

Abstract:
1. A terahertz wave measurement device comprising: a base plate at which a sample is to be disposed, the base plate being transmissive to terahertz waves; a conductive periodic structure in which a plurality of transmission portions that transmit terahertz waves are arrayed with a predetermined period, at least a surface of the conductive periodic structure being constituted with a conductive material, and the conductive periodic structure being disposed apart from a position at which the sample is disposed; and a waveguide including a total reflection surface provided at a boundary face with the conductive periodic structure, the total reflection surface totally reflecting incident terahertz waves, and the waveguide guiding incident terahertz waves in a direction toward the total reflection surface, wherein the magnitude of at least one of a distance between the position at which the sample is disposed and the conductive periodic structure, a property of the base plate, or the predetermined period is set such that terahertz waves emitted from the waveguide by total reflection at the total reflection surface show a characteristic absorption in a predetermined frequency region.