1. Gradient Nonlinear Pancharatnam-Berry Metasurfaces.
- Author
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Tymchenko, Mykhailo, Gomez-Diaz, J. Sebastian, Lee, Jongwon, Nookala, Nishant, Belkin, Mikhail A., and Alù, Andrea
- Subjects
- *
NONLINEAR waves , *OPTICAL phase matching , *SECOND harmonic generation , *POLARIZATION (Nuclear physics) , *OPTICAL devices - Abstract
We apply the Pancharatnam-Berry phase approach to plasmonic metasurfaces loaded by highly nonlinear multiquantum-well substrates, establishing a platform to control the nonlinear wave front 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 wave front control is achieved over thin devices with giant nonlinear responses. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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