Chiral-magic angle of nanoimprint meta-device
Author:
Chen Mu Ku123ORCID, Zhang Jing Cheng13ORCID, Leung Cheuk Wai12ORCID, Sun Linshan1ORCID, Fan Yubin1ORCID, Liang Yao1ORCID, Yao Jin1ORCID, Liu Xiaoyuan1ORCID, Yuan Jiaqi1ORCID, Xu Yuanhao12ORCID, Tsai Din Ping123ORCID, Pang Stella W.123ORCID
Affiliation:
1. Department of Electrical Engineering , City University of Hong Kong , Kowloon , Hong Kong SAR , China 2. Centre for Biosystems, Neuroscience, and Nanotechnology , City University of Hong Kong , Kowloon , Hong Kong SAR , China 3. The State Key Laboratory of Terahertz and Millimeter Waves , City University of Hong Kong , Kowloon , Hong Kong SAR , China
Abstract
Abstract
The magic angle of Twistronics has attracted a lot of attention because of its peculiar electrical characteristics. Moiré patterns formed by the superlattice of a twisted bilayer change overall physical properties. Circular dichroism can also be manipulated through the generated moiré pattern. Here, we report a polymer-based twisted bilayer meta-device fabricated by multilayer nanoimprint technology and study the magic angle of chirality. The superlattice of the bilayer meta-device creates moiré patterns and brings unique chiral optical responses. The bilayer nanoimprint technology is developed for metasurfaces with relative twist angles. Via the twist angle control, polymer materials with a low refractive index can manipulate the electric field of the light and reveal the chiral magic angle. Moreover, the shape of the meta-atoms plays a key role in chiral magic angle tuning. The chirality engineering by the reported nanoimprint technology and chiral meta-devices may contribute to applications in chiral imaging, biomedical sensing, lasing, and tunable optical devices.
Funder
the University Grants Committee / Research Grants Council of the Hong Kong Special Administrative Region, China the City University of Hong Kong the Center for Biosystems, Neuroscience, and Nanotechnology of City University of Hong Kong the Department of Science and Technology of Guangdong Province the Shenzhen Science and Technology Innovation Commission
Publisher
Walter de Gruyter GmbH
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
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