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Fabrication of Polarization Control Devices Using metal grating Structures

Optics and Photonics Journal 2022年第9期13卷 201-213页

作者： Atsushi Motogaito Yukino Hayashi Akinori Watanabe Kazumasa Hiramatsu Graduate School of Engineering Mie University Tsu Japan

A polarization control device was developed using a plasmonic metasurface with the aim of achieving the desired polarization state. In this study, the Ag metal grating structure was fabricated as a plasmonic metasurface by electron beam lithography and a lift-off process. The phase difference of the fabricated sample was 21.0°. This value is almost consistent with the simulation (24.0°). Then, the transmission and phase difference is dependent on the structural parameter. Because of the propagation of surface plasmon polariton at the interface between Ag and SiO2 or Ag and air, it is believed that the transmittance and the phase difference for TM polarized light can be controlled by the structural parameters. By plotting on the Poincaré sphere after calculating the S-parameter by simulation, it is clear that the arbitrary polarization status can be controlled by the structural parameter.

关键词： Surface Plasmon metal grating Polarization Control Plasmonic Metasurface

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Extraordinary optical transmission through metal gratings with single and double grooved surfaces

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Chinese Physics B 2010年第1期19卷 479-483页

作者：汪丽春邓立崔妮钮月萍龚尚庆 State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences Graduate School of Chinese Academy of Sciences

We investigate the transmission properties of a normally incident TM plane wave through metal films with periodic parabolic-shaped grooves on single and double surfaces using the finite-difference-time-domain method. Nearly zero transmission efficiency is found at wavelengths corresponding to surface plasmon excitation on a fiat surface in the case where the single surface is grooved. Meanwhile, resonant excitation of surface plasmon polariton （SPP） Bloch modes leads to a strong transmission peak at slightly larger wavelengths. When the grating is grooved on double surfaces, the transmission enhancement can be dramatically improved due to the resonant tunnelling between SPP Bloch modes.

关键词： metal grating surface plasmon transmission

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Surface-plasmonic sensor using a columnar thin film in the grating-coupled configuration [Invited]

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Chinese Optics Letters 2021年第8期19卷 121-129页

作者： Kiran Mujeeb Muhammad Faryad Akhlesh Lakhtakia Julio V.Urbina Department of Electronics Quaid-i-Azam UniversityIslamabad 45320Pakistan Department of Physics Lahore University of Management SciencesLahore 54792Pakistan Department of Engineering Science and Mechanics The Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA Department of Electrical Engineering The Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA

The excitation of a surface-plasmon-polariton(SPP) wave guided by a columnar thin film(CTF) deposited on a one-dimensional metallic surface-relief grating was investigated for sensing the refractive index of a fluid infiltrating that CTF. The Bruggemann homogenization formalism was used to determine the relative permittivity scalars of the CTF infiltrated by the fluid. The change in the refractive index of the fluid was sensed by determining the change in the incidence angle for which an SPP wave was excited on illumination by a p-polarized plane wave, when the plane of incidence was taken to coincide with the grating plane but not with the morphologically significant plane of the CTF. Multiple excitations of the same SPP wave were found to be possible, depending on the refractive index of the fluid, which can help increase the reliability of results by sensing the same fluid with more than one excitation of the SPP wave.

关键词： metal grating multiple excitation rigorous coupled-wave approach sensitivity surface-plasmon-polariton wave

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