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All-Dielectric Intersubband Polaritonic Metasurface with Giant Second-Order Nonlinear Response

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Abstract

We demonstrate an extremely nonlinear all-dielectric metasurface that employs intersubband polaritons to achieve a second-harmonic conversion coefficient of 3 mW/W2, and second-harmonic power conversion efficiency of 0.045% at a modest pump intensity of 6.7 kW/cm2.

© 2020 The Author(s)

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