Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.237401
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Funding
- National Key R&D Program of China [2017YFA0305100, 2017YFA0 303800]
- National Natural Science Foundation of China [92050114, 61775106, 11904182, 11711530205, 11374006, 11774185, 91750204]
- 111 Project [B07013]
- PCSIRT [IRT0149]
- Open Research Program of Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province
- Fundamental Research Funds for the Central Universities [010-63201003, 010-63201008, 01063201009]
- Tianjin youth talent support program
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Optical activity from chiral metamaterials is both fundamental in electrodynamics and useful for polarization control applications. It is normally expected that due to infinitesimally small thickness, two-dimensional (2D) planar metamaterials cannot introduce large optical rotations. Here, we present a new mechanism to achieve strong optical rotation up to 90 degrees by evoking phase transition in the 2D metamaterials through tuning coupling strength between meta-atoms. We analytically elucidate such phenomenon by developing a model of phase-transition coupled-oscillator array. And we further corroborate our ideas with both numerical simulations and experiments. Our findings would pave a new way for applying the concept of phase transition in photonics for designing novel optical devices for strong polarization controls and other novel applications.
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