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Giant Nonlinear Optical Activity of Achiral Origin in Planar Metasurfaces with Quadratic and Cubic Nonlinearities
Author(s) -
Chen Shumei,
Zeuner Franziska,
Weismann Martin,
Reineke Bernhard,
Li Guixin,
Valev Ventsislav Kolev,
Cheah Kok Wai,
Panoiu Nicolae Coriolan,
Zentgraf Thomas,
Zhang Shuang
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201505640
Subject(s) - materials science , planar , quadratic equation , nonlinear system , nonlinear optical , cubic crystal system , optics , cubic function , condensed matter physics , molecular physics , mathematical analysis , geometry , physics , mathematics , quantum mechanics , computer science , computer graphics (images)
3D chirality is shown to be unnecessary for introducing strong circular dichroism for harmonic generations. Specifically, near‐unity circular dichroism for both second‐harmonic generation and third‐harmonic generations is demonstrated on suitably designed ultrathin plasmonic metasurfaces with only 2D planar chirality. The study opens up new routes for designing chip‐type biosensing platform, which may allow for highly sensitive detection of bio‐ and chemical molecules with weak chirality.