Mixed plasmons coupling for expanding the bandwidth of near-perfect absorption at visible frequencies | Zendy

Chenggang Hu | Zendy; Liyuan Liu | Zendy; Zeyu Zhao | Zendy; Xu’nan Chen | Zendy; Xiangang Luo | Zendy

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Mixed plasmons coupling for expanding the bandwidth of near-perfect absorption at visible frequencies

Author(s) -

Chenggang Hu,

Liyuan Liu,

Zeyu Zhao,

Xu’nan Chen,

Xiangang Luo

Publication year - 2009

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.17.016745

Subject(s) - surface plasmon , optics , materials science , plasmon , bandwidth (computing) , wavelength , coupling (piping) , absorption (acoustics) , near and far field , dispersion (optics) , electromagnetic field , optoelectronics , physics , telecommunications , quantum mechanics , computer science , metallurgy

We theoretically investigate the electromagnetic response of mixed-size sub-wavelength square hole array (M-SHA) combined with thick metal layer (TML). Near-perfect absorption with bandwidth about 17 nm is firstly observed. Field distribution and dispersion relationship indicate that mixed surface plasmons (M-SPs) coupling is supported by M-SHA and TML. The absorption band is proved to be dominated by M-SPs coupling.

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