Kerr metasurface enabled by metallic quantum wells

Junxiao Zhou; Haoliang Qian; Ching-Fu Chen; Zhaowei Liu

doi:10.1117/12.2568899

20 August 2020 Kerr metasurface enabled by metallic quantum wells

Junxiao Zhou, Haoliang Qian, Ching-Fu Chen, Zhaowei Liu

Proceedings Volume 11460, Metamaterials, Metadevices, and Metasystems 2020; 1146020 (2020) https://doi.org/10.1117/12.2568899
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Conference Poster

Abstract

Our work combines the extreme nonlinear properties in MQWs with the implementation of metasurface. We introduce the quantum multilayer composed of TiN/Al₂O₃ as a tunable metamaterial, which couples with the localized plasmonic resonances (gap plasmon) of an array of gold nano-antennas forming a meta-device. When the metasurface sample is illuminated by a collimated low-intensity laser with a linear polarization, the reflected beam is being diffracted as the left- and right-handed circularly polarized (LCP and RCP) components into 1 order, respectively. While for the case of a high-intensity laser illumination, the metasurface will act as a mirror, i.e. the linear polarization remains unchanged with both RCP and LCP components reflected to its zero-order. Furthermore, a tunable hologram is demonstrated based on our proposed design. A clear image is observed when the metasurface is illuminated by a low-intensity laser, while for the high-intensity case, the image will disappears Our finding paves the way for nonlinear optical modulators25, high speed all-optical switchs26 and reflective tunable displays.

Citation Download Citation

Junxiao Zhou, Haoliang Qian, Ching-Fu Chen, and Zhaowei Liu "Kerr metasurface enabled by metallic quantum wells", Proc. SPIE 11460, Metamaterials, Metadevices, and Metasystems 2020, 1146020 (20 August 2020); https://doi.org/10.1117/12.2568899

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