公开(公告)号：US11320647B2

公开(公告)日：2022-05-03

申请号：US16263071

申请日：2019-01-31

Applicant: Massachusetts Institute of Technology

Inventor： Jeffrey Chou ,  Vladimir Liberman ,  Juejun Hu ,  Yifei Zhang ,  William Herzog ,  Jason Stewart ,  Christopher Roberts

IPC: G02F1/01 ,  G02B26/06 ,  G02B26/02 ,  G02B5/20 ,  G02B27/09

Abstract: Alloys of GeSbSeTe (GSST) can be used to make actively tunable infrared transmission filters that are small, fast, and solid-state. These filters can be used for hyperspectral imaging, 3D LIDAR, portable bio/chem sensing systems, thermal emission control, and tunable filters. GSST is a low-loss phase-change material that can switch from a low-index (n=3), amorphous state to a high-index (n=4.5), hexagonal state with low loss (k