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Broadband asymmetric light transmission through tapered metallic gratings at visible frequencies.

ABSTRACT: Asymmetric transmission phenomenon has attracted tremendous research interest due to its potential applications in integrated photonic systems. Broadband asymmetric transmission (BAT) is a highly desirable but challenging functionality to achieve in the visible regime due to the limitation of material dispersion. In this paper, we propose and numerically demonstrate that a tapered-metal-grating structure (TMGS) can achieve high-contrast BAT spectra covering the entire visible region. The transmission efficiency reaches ~95% for the forward illumination and ~35% for the backward illumination at the same wavelengths, respectively, and the corresponding transmission ratio is larger than 2.5 over a broadband wavelength regime. Such a design with high performance suggests applications for unidirectional optical transmission, optical diode, and so on.

SUBMITTER: Tang B

PROVIDER: S-EPMC5153634 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature

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Broadband asymmetric light transmission through tapered metallic gratings at visible frequencies.

Tang Bin B Li Zhongyang Z Liu Zizhuo Z Callewaert Francois F Aydin Koray K

Scientific reports 20161213

Asymmetric transmission phenomenon has attracted tremendous research interest due to its potential applications in integrated photonic systems. Broadband asymmetric transmission (BAT) is a highly desirable but challenging functionality to achieve in the visible regime due to the limitation of material dispersion. In this paper, we propose and numerically demonstrate that a tapered-metal-grating structure (TMGS) can achieve high-contrast BAT spectra covering the entire visible region. The transmi ...[more]

PMID: 27958369

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