Department of Physics
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.
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EPSRC. Grant Number: EP/J018473/1 ; Leverhulme. Grant Number: RPG-2012-674 ; Deutsche Forschungsgemeinschaft. Grant Numbers: TRR142/A05, ZE953/7-1 ; European Research Council/ERC. Grant Number: ERC-2014-CoG-648328 ; NSFC. Grant Number: 61328503
This is the peer reviewed version of the following article: Chen, S., Zeuner, F., Weismann, M., Reineke, B., Li, G., Valev, V. K., . . . Zhang, S. (2016). Giant nonlinear optical activity of achiral origin in planar metasurfaces with quadratic and cubic nonlinearities. Advanced Materials, 28(15), 2992-2999. doi:10.1002/adma.201505640, which has been published in final form at https://dx.doi.org/10.1002/adma.201505640. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
metasurfaces, nonlinear optics, circular dichroism, plasmonic
Chen, Shumei, Franziska Zeuner, Martin Weismann, Bernhard Reineke, Guixin Li, Ventsislav Kolev Valev, Kok Wai Cheah, Nicolae Coriolan Panoiu, Thomas Zentgraf, and Shuang Zhang. "Giant nonlinear optical activity of achiral origin in planar metasurfaces with quadratic and cubic nonlinearities." Advanced Materials 28.15 (2016): 2992-2999.