Broadband asymmetric light transmission through tapered metallic gratings at visible frequencies

Bin Tang; Zhongyang Li; Zizhuo Liu; Francois Callewaert; Koray Aydin

doi:10.1038/srep39166

Broadband asymmetric light transmission through tapered metallic gratings at visible frequencies

Bin Tang^*, Zhongyang Li, Zizhuo Liu, Francois Callewaert, Koray Aydin

^*Corresponding author for this work

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

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.

Original language	English (US)
Article number	39166
Journal	Scientific reports
Volume	6
DOIs	https://doi.org/10.1038/srep39166
State	Published - Dec 13 2016

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title = "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.",

author = "Bin Tang and Zhongyang Li and Zizhuo Liu and Francois Callewaert and Koray Aydin",

note = "Publisher Copyright: {\textcopyright}The Author(s) 2016.",

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T1 - Broadband asymmetric light transmission through tapered metallic gratings at visible frequencies

AU - Tang, Bin

AU - Li, Zhongyang

AU - Liu, Zizhuo

AU - Callewaert, Francois

AU - Aydin, Koray

PY - 2016/12/13

Y1 - 2016/12/13

N2 - 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.

AB - 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.

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Broadband asymmetric light transmission through tapered metallic gratings at visible frequencies

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