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Giant nonlinear response of polaritonic metasurfaces coupled to intersubband transitions

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We report highly-nonlinear metasurfaces based on combining electromagnetically-engineered plasmonic nanoresonators with quantum-engineered intersubband nonlinearities. Experimentally, effective nonlinear susceptibility over 480 nm/V was measured for second-harmonic generation at normal incidence.

© 2015 Optical Society of America

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