Multi-mode circular dichroism in n-fold rotational symmetric metamaterials

被引：0
作者：
Shihao Li
Kejian Chen
Yeli Xu
Yan Chen
机构：
[1] University of Shanghai for Science and Technology,Shanghai Key Lab of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education
来源：
Optical and Quantum Electronics | 2022年 / 54卷
关键词：
Chiral metamaterial; Differential transmittance; Circular dichroism; Multi-mode; Absorption;
D O I：
暂无
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学科分类号：
摘要：
In this article, the effects of the rotation angle between upper and lower n-fold rotational symmetric nano-structures are studied. Various modes of circular dichroism (single wavelength band, dual-wavelength bands, and more than two wavelength bands) in the wavelength band from 3.3 to 5 μm are realized. Circular dichroism up to 0.798 are observed. Meanwhile, sensitivity of circular dichroism to the rotation angle and reconfigure strategy for opposite responses has been discussed. Based on Born-Kuhn model, physical mechanism of mode’s switching is explained with charge distributions. The multi-mode chiroptical responses in mid-infrared band and the variety of design strategies have potential applications in the field of tunable multi-band chiral devices.
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