Light trapping cavity enhanced light transmission through a single sub-wavelength aperture in a metal film | Zendy

Juuso Olkkonen | Zendy

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Light trapping cavity enhanced light transmission through a single sub-wavelength aperture in a metal film

Author(s) -

Juuso Olkkonen

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.17.023992

Subject(s) - opacity , optics , materials science , aperture (computer memory) , monochromatic color , wavelength , extraordinary optical transmission , visible spectrum , optoelectronics , surface plasmon , surface plasmon polariton , plasmon , physics , acoustics

We demonstrate that optical transmission of a normally incident, monochromatic plane wave through a single sub-wavelength aperture in an opaque metal film can be substantially enhanced by a thin, semitransparent metal film placed parallel to the opaque metal film in front of the aperture. When the semi-transparent and the opaque metal film are separated by a proper distance, a light trapping cavity is formed and the sub-wavelength aperture exhibits a transmission maximum. An enhancement factor of approximately 40 is demonstrated for a cylindrical 100 nm diameter hole in a silver film.

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