Polarization-controlled grating polarizer under second Bragg incidence with silver deposited in groove

Gao, Chenhao; Wang, Bo; Fu, Chen; Fang, Jimin; Wen, Kunhua; Meng, Ziming; Nie, Zhaogang; Xing, Xiangjun; Chen, Li; Liu, Liang; Zhou, Jinyun

doi:10.1016/j.optcom.2019.125063

Cited by 10 publications

(4 citation statements)

References 31 publications

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“… – 4 The wire grid polarizers (WGPs) have a series of advantages such as large spectral range, small feature size, and easy integration. They can be integrated directly onto the focal plane array (FPA) of an IR imaging system, and used for measuring synchronously the Stokes vector components within a single image frame 5 – 7 Such devices can overcome the challenges posed by unique natural environment in polarization detection and improve the reconnaissance capability of MWIR detection 8 …”

Section: Introductionmentioning

confidence: 99%

“…They can be integrated directly onto the focal plane array (FPA) of an IR imaging system, and used for measuring synchronously the Stokes vector components within a single image frame. [5][6][7] Such devices can overcome the challenges posed by unique natural environment in polarization detection and improve the reconnaissance capability of MWIR detection. [8][9][10] Baker et al 11 integrated the metal WGPs with four polarization directions into a camera, whose edge detection sensitivity is superior.…”

Section: Introductionmentioning

confidence: 99%

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Design of an Au–Pt–Ti wire-grid polarizer based on midinfrared pixelated micropolarizer arrays

Shaohu

Zhao

et al. 2023

Opt. Eng.

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Polarization information is widely used in complex applications such as industrial detection, biomedicine, earth remote sensing, modern military, and aerospace. However, traditional polarization devices cannot adequately satisfy the requirements of increasingly complex environments. A subwavelength grating consisting of three types of materials, namely, aurum, platinum, and titanium, was designed to improve the performance of the polarimetric components of a midwavelength infrared polarization imaging system. The morphological structure parameters of the designed grating were optimized by analyzing the effects on the polarization performance through the rigorous coupled wave theory. The proposed Au-Pt-Ti composite grating could address the problem of grating peeling off from the substrate because of high temperature during preparation. The composite grating has some advantages such as high mechanical stability, lower oxidation, and great polarization properties. The diffraction can be reduced and the extinction ratio (ER) can be effectively enhanced in a midwave infrared (MWIR) focal plane array through appropriate reduction in the termination edge spacing and the addition of a gold frame between polarizer pixels. The grating with a period of 0.8 μm was designed for application in the MWIR band. The fill factor was 0.5 and the depths of Au-Pt-Ti in the grating region were 0.44 μm. Each pixel was separated by a 3.2-μm wide gold frame. Modeling results revealed that the ER of grating was higher than 28.68 and 32.77 above the incident wavelengths of 3.89 and 4.57 μm, respectively. Additionally, excellent polarization capability was observed over a wide MWIR spectrum. Furthermore, the current manufacturing process level may generate polarizers with the aforementioned structural specifications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of an Au–Pt–Ti wire-grid polarizer based on midinfrared pixelated micropolarizer arrays

Shaohu

Zhao

et al. 2023

Opt. Eng.

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“…A. Jullien et al reported the controlling polarization status of nonlinear materials [29]. C. Gao et al reported the use of a multilayer dielectric grating structure to create a polarization-controlled grating polarizer [30]. P. C. Wu et al reported a broadband wide-angle multifunctional polarization converter in the electromagnetic wave region using a liquid-metal-based metasurface [31].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Polarization Control Devices Using Metal Grating Structures

Motogaito¹,

Hayashi²,

Watanabe³

et al. 2022

OPJ

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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 SiO 2 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.

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“…The diffraction theory or experimental fabrication of traditional gratings have been extensively studied [1][2][3][4]. By optimizing the grating profile parameters, the designed grating can be used in various fields, such as sensors [5], beam splitters [6][7][8], polarizers [9][10][11], filters [12][13][14], absorbers [15][16][17][18], and solar cells [19][20][21][22], etc. In recent years, with the development of ultra-precision optical devices and the improvement of multi-beam splitting in the optical system of lithography machines, multi-channel beam splitters have aroused wide interest among researchers in the production and application environment.…”

Section: Introductionmentioning

confidence: 99%

Compact silica-based equal nine-channel generated by triple-layer arrays

Fang

Wang

2021

Phys. Scr.

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In order to achieve the demands of multi-beam splitting in the optical communication system, a compact high-efficiency silica-based nine-channel beam splitter grating (BSG) at infrared wavelength is proposed based on a three-layer array structure. The grating profile parameters are investigated by the rigorous coupled-wave analysis (RCWA) and the finite-element method (FEM). The total efficiency of the nine-channel beam splitter reaches 96.98%, and the error of uniformity is reduced to 2.98%. The results show that the theoretical values of the two optimization methods are in good agreement. Moreover, the presented grating has a good performance against fabrication tolerances. The modal method is used for detailed physical explanation of the energy exchange and propagation modes inside the grating. The proposed high-efficiency nine-channel beam separation by three-layer arrays should be helpful for developing the multi-beam splitting of the optical system of the lithography machine and the new ultra-precision optical devices.

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Polarization-controlled grating polarizer under second Bragg incidence with silver deposited in groove

Cited by 10 publications

References 31 publications

Design of an Au–Pt–Ti wire-grid polarizer based on midinfrared pixelated micropolarizer arrays

Design of an Au–Pt–Ti wire-grid polarizer based on midinfrared pixelated micropolarizer arrays

Fabrication of Polarization Control Devices Using Metal Grating Structures

Compact silica-based equal nine-channel generated by triple-layer arrays

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