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Giant Nonlinear Optical Activity from Planar Metasurfaces

Li, G; Chen, S; Zeuner, F; Weismann, M; Reineke, B; Valev, VK; Cheah, KW; ... Zentgraf, T; + view all (2016) Giant Nonlinear Optical Activity from Planar Metasurfaces. Presented at: Metamaterials 2016, Crete, Greece. Green open access

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Abstract

Second harmonic generation circular dichroism (CD) is more sensitive to the handedness of chiral materials than its linear optical counterpart. In this work, we show that 3D chiral structures are not necessary for introducing strong CD for harmonic generations. Specifically, we demonstrate giant CD for both second harmonic generation and third harmonic generation on suitably designed ultrathin plasmonic metasurfaces. It is experimentally and theoretically verified that the overwhelming contribution to this nonlinear CD is of achiral origin. The results shed new light on the origin of the nonlinear CD effect in achiral planar surfaces.

Type: Conference item (Presentation)
Title: Giant Nonlinear Optical Activity from Planar Metasurfaces
Event: Metamaterials 2016
Location: Crete, Greece
Dates: 17-22 September 2016
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: This version is the author accepted manuscript.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1531478
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