公开(公告)号：US12130507B1

公开(公告)日：2024-10-29

申请号：US18204158

申请日：2023-05-31

Applicant: HRL Laboratories, LLC

Inventor： David Chow ,  Joseph Jensen ,  Jeong-Sun Moon ,  Kyung-Ah Son ,  Ryan Quarfoth

IPC: G02F1/01 ,  G01J1/04 ,  G02F1/17

CPC classification number: G02F1/0147 ,  G01J1/0407 ,  G02F1/17

Abstract: A reconfigurable optical frequency selective structure having embedded therein:



(a) an array of optical antennas for picking up propagating radiation in a visible or infrared frequency region and achieving preferential absorption of electromagnetic energy at a target wavelength k within the region,
(b) an array of optical mesa structures of sub-wavelength scale including a phase-change material, the array of optical antennas being disposed atop the array of optical mesa structures respectively;
(c) a metal ground plane disposed beneath the array of optical mesa structures, the array of optical mesa structures standing above the ground plane or an interfacial layer and being separated from one another to inhibit parasitic capacitance coupling therebetween; and
(d) a plurality of heaters for selectively heating any one of the array of optical mesa structures to cause the phase change material in the selected optical mesa structure to change from an amorphous state, wherein the antenna atop the selected mesa structure is capacitively coupled to the metal ground plane, to a crystalline state wherein the antenna atop the selected mesa structure is electrically shunted to the ground plane via the selected mesa structure.