Optical component, terahertz wave module, and optical component manufacturing method

The purpose of the present invention is to provide: an optical component made from a material through which terahertz waves can pass, which is not susceptible to damage, and which is easily manufactured; a terahertz wave module equipped with the same; and a method for manufacturing said optical component.　This optical component is formed from alumina, and terahertz electromagnetic waves pass into the alumina. Alumina allows terahertz waves to pass therethrough. Furthermore, because alumina components are high-strength, and can be molded by injection molding or powder molding, the abovementioned issues are resolved.