公开(公告)号：US09772476B2

公开(公告)日：2017-09-26

申请号：US14372047

申请日：2012-12-14

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Ki-Hun Jeong ,  Sang-Gil Park ,  Youngseop Lee

IPC: G02B13/14 ,  G02B3/00 ,  B29C45/37 ,  B29D11/00 ,  B29L11/00

CPC classification number: G02B13/14 ,  B29C45/372 ,  B29D11/00028 ,  B29L2011/0016 ,  G02B3/0087 ,  G02B2207/107

Abstract: Provided are a gradient index lens using the effective refractive index of a microstructure operating in the terahertz frequency regions and mid-infrared regions at wavelengths of 0.8 m to 3 mm and a method for manufacturing the same. Based on the effective medium theorem, the effective refractive index is controlled by using a structure smaller than the mid-infrared and terahertz wavelength, and a gradient can be provided for the refractive index in a radial direction and in an axial direction. Thus, beams in the mid-infrared and terahertz frequency region can be converged.