Arbitrary Tuning of Polarization and Circular Dichroism Based on Guided Mode Resonance of Achiral Dielectric Metasurfaces

IF 9.8 1区 物理与天体物理 Q1 OPTICS
Fanghao Zhou, Chenqian Wang, Rui Wang, Wenbin Huang, Linsen Chen, Ti Sun, Chinhua Wang
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引用次数: 0

Abstract

Metasurfaces designed for dynamically modulation of strong circular dichroism (CD) hold significant potential in engineering fields such as polarization detection, spectral sensing, and optical communication. Such metasurfaces often require precise and complex chiral structural designs and activation, which limit their practical applications. Here, a simple and achiral dielectric metasurface based on guided mode resonance (GMR) is proposed and experimentally demonstrated for achieving arbitrary polarization and CD tuning. A truncated dielectric grating (TDG) structure involving only three parameters is employed to construct a complete and continuous variation of polarization modes around Γ‐point. The proposed achiral metasurface can achieve a near‐perfect CD peak of 0.97 at 1.55 µm and also continuous tuning of CD from −0.97 to 0.97 by simply changing the azimuth angle of the TDG at a designed incident angle. Furthermore, under a linearly polarized incidence, the output polarization state can be arbitrarily tuned from linear to either of two orthogonal circular polarization. The proposed metasurface with minimalist achiral and dielectric structure that can significantly reduce both the design and the fabrication complexity provides a novel paradigm for various polarization manipulation in fields of spin‐selective wavefront shaping, angular sensing, optical security, and other dynamic chiral optical devices.
基于非手性介电超表面导模共振的偏振和圆二色性任意调谐
设计用于动态调制强圆二色性(CD)的超表面在偏振检测、光谱传感和光通信等工程领域具有重要的潜力。这种超表面通常需要精确和复杂的手性结构设计和激活,这限制了它们的实际应用。本文提出了一种基于导模共振(GMR)的简单的非手性介电超表面,并通过实验证明了它可以实现任意极化和CD调谐。采用仅包含三个参数的截断介质光栅(TDG)结构,构建了Γ‐点附近完整连续的偏振模式变化。所提出的非手性超表面可以在1.55µm处获得接近完美的0.97的CD峰值,并且可以通过在设计的入射角上简单地改变TDG的方位角,将CD从- 0.97连续调谐到0.97。此外,在线性偏振入射下,输出偏振态可以任意地从线性调谐到两个正交圆偏振中的任何一个。所提出的超表面具有极简的非手性和介电结构,可以显著降低设计和制造的复杂性,为自旋选择性波前整形、角度传感、光学安全以及其他动态手性光学器件领域的各种偏振操纵提供了一种新的范例。
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来源期刊
CiteScore
14.20
自引率
5.50%
发文量
314
审稿时长
2 months
期刊介绍: Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.
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