Continuously Modulated Helical Dichroism of Tunable Chiral System by Magnetic Field Control

IF 6.5 1区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Photonics Pub Date : 2025-05-07 DOI:10.1021/acsphotonics.5c0038910.1021/acsphotonics.5c00389

Zeheng Wu, Hao Wu, Yusheng Jin, Yuan Tao, Zhongguo Ren, Jincheng Ni*, Yanlei Hu, Dong Wu, Jiaru Chu and Jiawen Li*,

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引用次数: 0

Abstract

Dynamically tunable circular dichroism (CD) shows significant potential in biosensing, information storage and encryption, and optical displays. However, as another dimension of chiroptical responses, continuously tunable orbital angular momentum (OAM)-dependent helical dichroism (HD) spectra remain challenging. Here, we introduce a magnetically actuated tunable chiral system, which can realize geometric reconfiguration and the modulation of corresponding HD spectra under the control of a magnetic field. The geometric reconfiguration demonstrates fast responsiveness (∼2.01 s), stability, and robustness under magnetic actuation. The tunability and continuity of geometric chirality are demonstrated through Osipov–Pickup–Dunmur (OPD)-based simulations. Moreover, precise modulation of the OPD magnitude and peak position can be realized by adjusting various structural parameters. Continuous control of the OAM-associated HD spectra can be achieved with tunability ranging from −75% to 74%. This modulation of HD, attributed to the influence of the magnetic field, showcases the potential of this magnetically actuated flexible chiral system as a versatile platform for manipulating OAM beams, paving the way for chiral optical systems and dynamic beam shaping applications.

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磁场控制可调手性系统的连续调制螺旋二色性

动态可调圆二色性（CD）在生物传感、信息存储和加密以及光学显示等领域显示出巨大的潜力。然而，连续可调谐轨道角动量（OAM）依赖的螺旋二色性（HD）光谱作为旋向响应的另一个维度仍然具有挑战性。本文介绍了一种磁致可调手性系统，该系统可以在磁场的控制下实现几何重构和相应的高清光谱调制。几何重构在磁驱动下具有快速响应性（~ 2.01 s）、稳定性和鲁棒性。通过基于osipov - pick - dunmur （OPD）的仿真，证明了几何手性的可调性和连续性。此外，通过调整各种结构参数，可以实现OPD大小和峰值位置的精确调制。oam相关高清光谱的连续控制可以实现，可调性范围为- 75%至74%。这种HD调制归因于磁场的影响，展示了这种磁驱动的柔性手性系统作为操纵OAM光束的通用平台的潜力，为手性光学系统和动态光束整形应用铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

11.90

自引率

5.70%

发文量

438

审稿时长

2.3 months

期刊介绍： Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.