Patent ID: 7940368
Filing Date: 2011-05-10
Classification: G01N,G02B

Abstract:
1. A Terahertz Polarizer structure, comprising: a first fused silica prism and a second fused silica prism, each of the first and second fused silica prisms including a right-angled triangular prism that is formed by a bottom surface, a vertical surface, a hypotenuse surface and a pair of mutually parallel side surfaces that are perpendicular to each of the bottom surface, the vertical surface and the hypotenuse surface, wherein the hypotenuse surface of the first fused silica prism and the hypotenuse surface of the second fused silica prism are disposed parallel to each other and are separated by a gap; a liquid crystal layer with birefringence is filled within the gap; two permanent magnets with reverse polarities respectively placed at an external side of one of the pair of side surfaces of each of the first and second fused silica prisms and at an external side of the other one of the pair of side surfaces of each of the first and second fused silica prisms; and an optical source, placed at an external side of the bottom surface of the first fused silica prism; wherein the optical source generates an optical wave to enter through the bottom surface of the first fused silica prism, then to pass through the liquid crystal layer and to leave from the bottom surface of the second fused silica prism.