Han Li, Xuejun Qiu, Junjiao Lu, Xinye Tian, Hao Long
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引用次数: 0
摘要
本文提出了一种基于对偏振敏感的二维钛光栅的紫外-近红外超材料吸收器(MMA)。该吸收器由形状为四边平台的二维钛光栅、一维二氧化硅光栅和金基板组成。当入射光在 X 方向偏振时,吸收器在 300-2400 纳米范围内实现了 95.72 % 的超宽带吸收。当入射光在 Y 方向偏振时,吸收器在 351 纳米处显示出近乎完美的超窄带吸收,窄带吸收的 Q 因子和灵敏度 (S) 分别为 38.14 和 123.21 nm/RIU。该吸收器还实现了 400-2400 纳米波长的偏振角选择性吸收,平均消光比为 25.73。阻抗匹配理论和电磁场的能量分布都很好地解释了偏振敏感的 MMA。所提出的吸收体能抵抗入射角的变化,可用于偏振成像、光电检测和光学传感器。
UV-NIR polarization sensitive metamaterial absorber based on two-dimensional titanium grating
A UV-NIR metamaterial absorber (MMA) based on a two-dimensional titanium grating that is sensitive to polarization is proposed. The absorber is composed of a two-dimensional titanium grating shaped as a four-edge platform, a one-dimensional SiO2 grating, and an Au substrate. When the incident light is polarized in the X direction, the absorber achieves ultra-broadband absorption of 95.72 % in the range of 300–2400 nm. When the incident light is polarized in the Y direction, the absorber exhibits near-perfect ultra-narrowband absorption at 351 nm, and the Q factor and the sensitivity (S) of the narrowband absorption are 38.14 and 123.21 nm/RIU, respectively. The absorber also achieves polarization angle selective absorption at 400–2400 nm with an average extinction ratio of 25.73. Both the impedance matching theory and the energy distribution of the electromagnetic field explain the polarization-sensitive MMA well. The proposed absorber is resistant to changes in incidence angle and may be useful in polarization imaging, photoelectric detection, and optical sensors.
期刊介绍:
Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields:
Optics:
-Optics design, geometrical and beam optics, wave optics-
Optical and micro-optical components, diffractive optics, devices and systems-
Photoelectric and optoelectronic devices-
Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials-
Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis-
Optical testing and measuring techniques-
Optical communication and computing-
Physiological optics-
As well as other related topics.