Journal article

Metasurfaces, dark modes, and high NA illumination

Lukas Wesemann, Panji Achmari, Kalpana Singh, Evgeniy Panchenko, Timothy D James, Daniel E Gomez, Timothy J Davis, Ann Roberts

OSA CONTINUUM | OPTICAL SOC AMER | Published : 2018

Abstract

The interaction of a focused beam with a metasurface supporting dark modes is investigated. We show computationally and experimentally that the excitation of dark modes is accompanied by characteristic changes in the reflected Fourier spectrum. This spatial frequency filtering capability indicates an avenue for the all-optical, on-chip detection of phase gradients for biological and other imaging techniques.

Grants

Awarded by Australian Research Council


Funding Acknowledgements

Australian Research Council Discovery Projects (DP160100983) and Future Fellowship scheme (FT140100514).