Tunable directional coupling of surface plasmon polaritons with linearly polarized light

Feng Huang; Xiangqian Jiang; Hanning Yang; Siren Li; Xiudong Sun

doi:10.1007/s00340-015-6306-7

Tunable directional coupling of surface plasmon polaritons with linearly polarized light

Feng Huang
, Xiangqian Jiang
, Hanning Yang
, Siren Li
, Xiudong Sun^*

^*Corresponding author for this work

School of Physics

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

13 Scopus citations

Abstract

A tunable directional surface plasmon polaritons (SPP) coupler, which utilizes the polarization direction of linearly polarized incident light to control the SPP coupling direction, is proposed. The SPP coupler consists of a column of V-shaped slot nanoantennas, which can support two kinds of plasmon resonant modes that have opposite symmetries. By controlling the polarization direction of linearly polarized incident light, the power flow of SPP coupled to the two opposite directions perpendicular to the column is continuously tuned. For 45° and 135° polarized incidence, SPP are unidirectional coupled to the two opposite directions, respectively. A highest extinction ratio of 31.6 dB is achieved, and the extinction ratio keeps larger than 10 dB within a wavelength of 135 nm.

Original language	English
Article number	16
Pages (from-to)	1-6
Number of pages	6
Journal	Applied Physics B: Lasers and Optics
Volume	122
Issue number	1
DOIs	https://doi.org/10.1007/s00340-015-6306-7
State	Published - 1 Jan 2016

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abstract = "A tunable directional surface plasmon polaritons (SPP) coupler, which utilizes the polarization direction of linearly polarized incident light to control the SPP coupling direction, is proposed. The SPP coupler consists of a column of V-shaped slot nanoantennas, which can support two kinds of plasmon resonant modes that have opposite symmetries. By controlling the polarization direction of linearly polarized incident light, the power flow of SPP coupled to the two opposite directions perpendicular to the column is continuously tuned. For 45° and 135° polarized incidence, SPP are unidirectional coupled to the two opposite directions, respectively. A highest extinction ratio of 31.6 dB is achieved, and the extinction ratio keeps larger than 10 dB within a wavelength of 135 nm.",

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AU - Huang, Feng

AU - Jiang, Xiangqian

AU - Yang, Hanning

AU - Li, Siren

AU - Sun, Xiudong

PY - 2016/1/1

Y1 - 2016/1/1

N2 - A tunable directional surface plasmon polaritons (SPP) coupler, which utilizes the polarization direction of linearly polarized incident light to control the SPP coupling direction, is proposed. The SPP coupler consists of a column of V-shaped slot nanoantennas, which can support two kinds of plasmon resonant modes that have opposite symmetries. By controlling the polarization direction of linearly polarized incident light, the power flow of SPP coupled to the two opposite directions perpendicular to the column is continuously tuned. For 45° and 135° polarized incidence, SPP are unidirectional coupled to the two opposite directions, respectively. A highest extinction ratio of 31.6 dB is achieved, and the extinction ratio keeps larger than 10 dB within a wavelength of 135 nm.

AB - A tunable directional surface plasmon polaritons (SPP) coupler, which utilizes the polarization direction of linearly polarized incident light to control the SPP coupling direction, is proposed. The SPP coupler consists of a column of V-shaped slot nanoantennas, which can support two kinds of plasmon resonant modes that have opposite symmetries. By controlling the polarization direction of linearly polarized incident light, the power flow of SPP coupled to the two opposite directions perpendicular to the column is continuously tuned. For 45° and 135° polarized incidence, SPP are unidirectional coupled to the two opposite directions, respectively. A highest extinction ratio of 31.6 dB is achieved, and the extinction ratio keeps larger than 10 dB within a wavelength of 135 nm.

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JO - Applied Physics B: Lasers and Optics

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Tunable directional coupling of surface plasmon polaritons with linearly polarized light

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