Zeroth order Fabry-Perot resonance enabled ultra-thin perfect light absorber using percolation aluminum and silicon nanofilms | Zendy

Seyed Sadreddin Mirshafieyan | Zendy; Ting S. Luk | Zendy; Junpeng Guo | Zendy

Open Access

Zeroth order Fabry-Perot resonance enabled ultra-thin perfect light absorber using percolation aluminum and silicon nanofilms

Author(s) -

Seyed Sadreddin Mirshafieyan,

Ting S. Luk,

Junpeng Guo

Publication year - 2016

Publication title -

optical materials express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.925

H-Index - 66

ISSN - 2159-3930

DOI - 10.1364/ome.6.001032

Subject(s) - materials science , silicon , wavelength , optics , absorption (acoustics) , optoelectronics , resonance (particle physics) , aluminium , percolation (cognitive psychology) , fabry–pérot interferometer , phase (matter) , atomic physics , physics , composite material , neuroscience , biology , quantum mechanics

We demonstrated perfect light absorption in optical nanocavities made of ultra-thin percolation aluminum and silicon films deposited on an aluminum surface. The total layer thickness of the aluminum and silicon films is one order of magnitude less than perfect absorption wavelength in the visible spectral range. The ratio of silicon cavity layer thickness to perfect absorption wavelength decreases as wavelength decreases due to the increased phase delays at silicon-aluminum boundaries at shorter wavelengths. It is explained that perfect light absorption is due to critical coupling of incident wave to the fundamental Fabry-Perot resonance mode of the structure where the round trip phase delay is zero. Simulations were performed and the results agree well with the measurement results.

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