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.
metasurfaces, nonlinear optics, circular dichroism, plasmonic
Source Publication Title
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.
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
Link to Publisher's Edition
Chen, S., Zeuner, F., Weismann, M., Reineke, B., Li, G., Valev, V., Cheah, K., Panoiu, N., Zentgraf, T., & Zhang, S. (2016). Giant nonlinear optical activity of achiral origin in planar metasurfaces with quadratic and cubic nonlinearities. Advanced Materials, 28 (15). https://doi.org/10.1002/adma.201505640