Open AccessRealizing near-perfect absorption at visible frequencies
Author(s) -
Chenggang Hu,
Zeyu Zhao,
Xunan Chen,
Xiangang Luo
Publication year - 2009
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.17.011039
Subject(s) - optics , surface plasmon , resonator , polarization (electrochemistry) , wavelength , split ring resonator , absorption (acoustics) , materials science , plasmon , coupling (piping) , electric field , reflection (computer programming) , physics , optoelectronics , chemistry , quantum mechanics , computer science , metallurgy , programming language
Sub-wavelength hole array (SHA) combined with thick metal layer (TML) is shown to have simultaneous suppressed transmission and reflection, resulting near-perfect absorption. Unlike the simultaneous electric and magnetic resonances in electric ring resonator and cut wire [PRL, 100, 207402 (2008)], such behavior results from strong anti-symmetric surface plasmons coupling supported by SHA and TML. The polarization-free characteristic permits to construct an ideal absorber for some practical applications in turbid backgrounds.