Open AccessControllable coherent perfect absorber made of liquid metal-based metasurface
Author(s) -
Fan Yang,
Yuancheng Fan,
Ruisheng Yang,
Jing Xu,
Quanhong Fu,
Fuli Zhang,
Zeyong Wei,
Hongqiang Li
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.025974
Subject(s) - materials science , liquid metal , optics , absorption (acoustics) , modulation (music) , lasing threshold , liquid crystal , optoelectronics , wavelength , physics , acoustics , composite material
Coherent perfect absorber (CPA) is a novel strategy proposed and demonstrated for solving the challenge to attain efficient control of absorption by exploiting the inverse process of lasing. The operation condition of CPA results in narrow-band, which is the main limitation obstruct it from practical applications. Here, we demonstrate a CPA with tunable operation frequency employing the liquid metal made reconfigurable metasurface. The flow of liquid metal is restricted with a plastic pipe for realizing a controllable liquid metal cut-wire. The adjustable electric dipolar mode of the reconfigurable cur-wire metasurface ensures that the quasi-CPA point can be dynamically controlled; the measured CPA under proper phase modulation is in good agreement with the simulation results. The proposed CPA system involving liquid metal for dynamic control of operation frequency will have potential applications and may stimulate the exploitation of liquid based smart absorption control of optical waves.