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arXiv · 1510.07306

Gradient Nonlinear Pancharatnam-Berry Metasurfaces

Mykhailo Tymchenko·J. Sebastiàn Gomez-Diaz·Jongwon Lee·Nishant Nookala·Mikhail A. Belkin·Andrea Alù
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Abstract

We apply the Pancharatnam-Berry phase approach to plasmonic metasurfaces loaded by highly nonlinear multi-quantum well substrates, establishing a platform to control the nonlinear wavefront at will based on giant localized nonlinear effects. We apply this approach to design flat nonlinear metasurfaces for efficient second-harmonic radiation, including beam steering, focusing, and polarization manipulation. Our findings open a new direction for nonlinear optics, in which phase matching issues are relaxed, and an unprecedented level of local wavefront control is achieved over thin devices with giant nonlinear responses.

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Mykhailo Tymchenko, J. Sebastiàn Gomez-Diaz, Jongwon Lee, Nishant Nookala, Mikhail A. Belkin, Andrea Alù. 2015-10-25. Gradient Nonlinear Pancharatnam-Berry Metasurfaces. https://arxiv.org/abs/1510.07306

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