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25 August 2020 Ultrafast light manipulation by using nonlinear chiral meta-mirror
Cheng-Yu Wang, Lei Kang, Xuexue Guo, Xingjie Ni, Douglas H. Werner, Zhiwen Liu
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Proceedings Volume 11497, Ultrafast Nonlinear Imaging and Spectroscopy VIII; 114970M (2020) https://doi.org/10.1117/12.2570776
Event: SPIE Optical Engineering + Applications, 2020, Online Only
Abstract
dWe demonstrate a nonlinear chiral meta-mirror consisting of an array of amorphous silicon split-ring resonators on top of a silver backplane with a silica spacer layer. This hybrid dielectric-plasmonic system can enhance Mie-resonance to result in strong light-matter interaction on the nanometer scale. The chiral meta-mirror exhibits a sharp absorption on one handedness of the circular polarization, and reflects the opposite handedness in a manner that preserves its polarization state in the linear regime. We show that the chiroptical responses can be tuned dynamically by leveraging photoexcited carriers in amorphous silicon. All optical, picosecond scale intensity modulation and polarization switching are studied.
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Cheng-Yu Wang, Lei Kang, Xuexue Guo, Xingjie Ni, Douglas H. Werner, and Zhiwen Liu "Ultrafast light manipulation by using nonlinear chiral meta-mirror", Proc. SPIE 11497, Ultrafast Nonlinear Imaging and Spectroscopy VIII, 114970M (25 August 2020); https://doi.org/10.1117/12.2570776
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KEYWORDS
Ultrafast phenomena
Dielectric polarization
Amorphous silicon
Absorption
Light-matter interactions
Modulation
Picosecond phenomena
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