Study of structural effects on the polarization characteristics of subwavelength metallic gratings in short infrared wavelengths

Tian, Shuoqiu; Liu, Tao; Pan, Xiaohang; Mu, Chengyang; Yuan, Wentao; Chen, Yifang

doi:10.1364/oe.473311

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…The method also takes into account beam drift and cold reflection effects and enables simple and direct polarization measurements [10]. In 2022, Tian studied the effect of the grating structure on polarization characteristics at the 1.1-1.6 µm wavelength, offering a guideline to further improve the polarization performance of gratings [11]. Although the above methods have analyzed and calibrated the polarization effects of different optical systems, there is still a lack of effective polarization effect optimization and calibration methods for computational spectral polarization imaging systems.…”

Section: Introductionmentioning

confidence: 99%

Multi-Parameter Model-Based Polarimetric Calibration for Dual-Coded Spectral Polarization Imaging System

Wang

Shi

et al. 2023

Photonics

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A polarization analysis method based on a multi-parameter model is proposed to address the polarization effect analysis and calibration requirements of a dual-coded snapshot spectral polarization imaging system. A full-link polarization effect model for a spectral polarization imaging system is established that includes a digital micromirror array (DMD), prism grating prism (PGP), micro-polarizer array detector (MPA), and multi-film. The influence of parameters such as the refractive index, incident angle, grating refractive index, constant, prism refractive index, vertex angle, multi-layer film complex refractive index, and film thickness on the optical transmittance of the system are analyzed. Using a dynamic data exchange mechanism to perform full-link, full-FOV, and full-pupil ray tracing on the optical system, the polarization effect distribution of the system under different degrees of polarization (DOP) and wavelengths is obtained. A calibration experiment for the controllable incident wavelength and DOP using narrowband filters and glass stacks is established. The experimental results show that in the 420 nm, 532 nm, and 635 nm wavelength bands, the MSEs of the calibrated values are 1.3924 × 10−4, 1.6852 × 10−4, and 1.6735 × 10−4, respectively. It is proven that the calibration method based on a multi-parameter model is feasible. Finally, the spectral polarization image at 532 nm is calibrated. The contrast ratio of metallic aluminum is calibrated from 7.13 to 15.33. This study provides a theoretical basis for the analysis and calibration of polarization effects in a dual-coded snapshot spectral polarization imaging system.

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Section: Introductionmentioning

confidence: 99%

Multi-Parameter Model-Based Polarimetric Calibration for Dual-Coded Spectral Polarization Imaging System

Wang

Shi

et al. 2023

Photonics

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Tunable magnetic field reversal and optical response from a split nanotube array prepared by obliquely depositing gold on a polymer grating

Jen,

Lin

2024

Optical Materials

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Multilayer subwavelength metallic grating as a high performance polarizer in infrared short wavelengths

Yuan,

Tian,

Guo

et al. 2024

Opt. Lett.

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This paper addresses the burning issue of both low transmission and limited extinction ratio in polarizers based on a single layer subwavelength grating in short infrared wavelengths. In this work, an alternative polarizer with four layers of subwavelength gratings in gold, encapsulated in silica, was developed. Systematic simulations using the finite-difference time-domain (FDTD) method were carried out in designing the polarizer for the structural dimensions to ensure the highest transmission and the highest extinction ratio. The designed polarizer was fabricated by using the high-precision registration technique in electron beam lithography (EBL), followed by metallization of golden gratings and plasma chemical vapor deposition of silica. Optic measurement shows both high transmission (40% anti-reflection effect) and high extinction ratio (∼27 dB) in the wavelengths of 1100–1600 nm be achieved. The developed multilayer subwavelength grating in Au provides us with the promising solution for high transmittance as well as high extinction ratios of grating based polarizers.

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Study of structural effects on the polarization characteristics of subwavelength metallic gratings in short infrared wavelengths

Cited by 3 publications

References 27 publications

Multi-Parameter Model-Based Polarimetric Calibration for Dual-Coded Spectral Polarization Imaging System

Multi-Parameter Model-Based Polarimetric Calibration for Dual-Coded Spectral Polarization Imaging System

Tunable magnetic field reversal and optical response from a split nanotube array prepared by obliquely depositing gold on a polymer grating

Multilayer subwavelength metallic grating as a high performance polarizer in infrared short wavelengths

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