Broadband and wide angle infrared wire-grid polarizer

Dai, Ming; Wan, Wenhui; Zhu, Xinhua; Song, Baosheng; Li, Xiaoping; Lu, Ming‐Hui; Cui, Bo; Chen, Yanfeng

doi:10.1364/oe.23.015390

Cited by 16 publications

(6 citation statements)

References 20 publications

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“…It can be found that ER usually presents a tendency of linear climb with the increment in the metal thickness, as shown in Figure 1c and S1, Supporting Information. The same conclusion can also be found in some references, [13b,18,31] but the thickness of the wire grid in these articles does not reach the level designed in this work. In ideal simulation, the results of ER can even reach more than 100 dB, as shown in Figure S1b, Supporting Information.…”

Section: Design and Simulationsupporting

confidence: 81%

“…[ 17 ] Some articles also propose high aspect ratio structures to improve the extinction ratio, but do not fabricate actually. [ 18 ] The main reason is that fabricating uniform wire grid with high aspect ratio on a large area is very difficult. However, we fabricate this structure via a new high‐power inductively coupled plasma (ICP) fast etching formula successfully.…”

Section: Introductionmentioning

confidence: 99%

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Large‐Area Wire Grid Polarizer with High Transverse Magnetic Wave Transmittance and Extinction Ratio for Infrared Imaging System

Wang

Chao

Liang

et al. 2022

Advanced Photonics Research

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Infrared (IR) wire grid polarizer is the core device of polarization imaging system with exceptional properties. However, the fabrication of high-quality devices with large area and good uniformity remains challenging. Herein, a new high aspect ratio structure is designed and fabricated, which makes the polarizer have high transverse magnetic (TM) transmittance and extinction ratio in a wide wavelength band. This study also presents some innovations to traditional fabrication processes. These improvements make it easier to fabricate polarizers with good performance as well as large areas. In a very wide wave band (3-15 μm), the extinction ratio is over 32.33 dB. The average TM transmittance of the wire grid layer is 80%, and of the polarizer is 56.57%, which is almost the highest on silicon substrate without antireflection (AR) coating. Meanwhile, the diameter with good uniformity is larger than 30 mm. This method is highly reproducible and can be mass-produced. The polarizer can cover atmospheric IR windows in both 3-5 and 7-12 μm simultaneously, which is suitable in IR imaging systems for remote sensing and astronomy observation.

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Section: Design and Simulationsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Large‐Area Wire Grid Polarizer with High Transverse Magnetic Wave Transmittance and Extinction Ratio for Infrared Imaging System

Wang

Chao

Liang

et al. 2022

Advanced Photonics Research

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show abstract

“…However, this kind of polarizers can only work in narrow angle ranges (nearby the Brewster angles) [23][24][25]. To achieve wide-angle high-performance polarizers, researchers proposed a series of twodimensional (2D) and three-dimensional (3D) nanostructures, including wire-grid gratings [26][27][28][29], metasurfaces [30][31][32][33][34] and helix arrays [35][36][37][38]. However, fabrication of 2D and 3D nanostructures operating at optical wavelengths generally requires lithography, which greatly increases the complexity and cost of fabrication [39,40].…”

Section: Introductionmentioning

confidence: 99%

Wide-angle high-performance polarizers based on all-elliptical-metamaterial one-dimensional photonic crystals

She,

Cheng,

et al. 2023

Phys. Scr.

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As a class of all-dielectric metamaterials, elliptical metamaterials (EMMs) with elliptical iso-frequency curves provide a lossless platform to manipulate light with unity efficiency. Herein, we select two kinds of EMMs as the elements to constitute a special class of one-dimensional (1-D) photonic crystals (PCs) called all-EMM 1-D PCs and realize polarization-sensitive photonic bandgaps (PBGs). Enabled by the polarization-sensitive property of the PBG, we achieve a wide-angle high-performance polarizer. The maximum polarization extinction ratio reaches 1.82×104 and the width of the operating angle range reaches 36.07°. Besides, the performance of the polarizer demonstrates robustness against the layer thickness. The all-EMM 1-D PCs are 1-D nanostructures completely consisting of dielectric thin films, which can be much easily fabricated compared with 2-D and 3-D nanostructures. Our work provides a lithography-free recipe to design wide-angle high-performance polarizers.

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“…Compared with the traditional prism polarizers, wire grid polarizers have potential for miniaturization and integration of the optical devices, which have been widely applied to many fields, including liquid-crystal display [1][2][3][4][5], imaging [6][7][8], beam splitters [5,9] and bio-detection [10]. The wire grid polarizers in the infrared [11][12][13][14][15][16][17] and terahertz [18][19][20][21][22] spectral range have been reported widely. Recently, the polarizing elements working at shorter wavelengths have received growing attention.…”

Section: Introductionmentioning

confidence: 99%

Deep-ultraviolet to mid-infrared polarizers by Al nanowire metamaterials

Xie

Wei

Wang

et al. 2019

J. Phys. D: Appl. Phys.

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Polarizers are one of the most fundamental elements used in optical devices. Compared with conventional prism polarizers, wire grid polarizers have potential for the miniaturization and integration of the optical devices. There are growing demands for design of the wire grid polarizers operating in a very broad spectral range from deep-ultraviolet to mid-infrared wavelengths. However, construction of the ultrabroadband polarizers based on the same structures and materials is very challenging. Here, ultrabroadband optical polarizers working in the deep-ultraviolet to mid-infrared spectral region, based on Al nanowire metamaterials with hexagonally packed nanowire arrays, are presented. To synchronously obtain high extinction ratios and low insertion losses, a q factor is found, when the q factor is fixed, the extinction ratio increases and the insertion loss simultaneously decreases with decreasing nanowire diameter. Moreover, the cutoff wavelength of the polarizers remarkably shifts to much shorter wavelength when the refractive index of the surrounding medium decreases. Consequently, the polarizers demonstrate high performance operating down to the deepultraviolet spectral range based on an optimal design of the Al nanowire metamaterials embedded in air by selecting a smaller diameter (e.g., 15 nm) and a suitable q factor (e.g., 2 or 2.5).

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Broadband and wide angle infrared wire-grid polarizer

Cited by 16 publications

References 20 publications

Large‐Area Wire Grid Polarizer with High Transverse Magnetic Wave Transmittance and Extinction Ratio for Infrared Imaging System

Large‐Area Wire Grid Polarizer with High Transverse Magnetic Wave Transmittance and Extinction Ratio for Infrared Imaging System

Wide-angle high-performance polarizers based on all-elliptical-metamaterial one-dimensional photonic crystals

Deep-ultraviolet to mid-infrared polarizers by Al nanowire metamaterials

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