Open AccessTunable artificial microwave blackbodies based on metasurfaces
Author(s) -
Yunsheng Guo,
Xiaojuan Hou,
Xiaolong Lv,
Ke Bi,
Ming Lei,
Ji Zhou
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.025879
Subject(s) - black body radiation , opacity , materials science , microwave , resonator , optics , dielectric , optoelectronics , dielectric resonator , physics , radiation , quantum mechanics
Inspired by the classic hole-cavity blackbody model, we propose an open metasurface blackbody operating at microwave frequencies, whose unit cell is a dielectric resonator lying on an opaque metal plate. The resonator has a high temperature coefficient of dielectric constant, thus the blackbody can be thermally tunable. Furthermore, when the resonator is combined with ferrite, a magnetically tunable blackbody is also obtained. Absorption spectra of these two tunable blackbody unit cells are measured, and they agree very well with the simulated results. The proposed blackbodies offer a new opportunity for practical tunable microwave absorbers in applications.