We present here a compact metasurface lens element that enables simultaneous and spatially separated imaging of light of opposite circular polarization states. The design overcomes a limitation of previous chiral lenses reliant on the traditional geometric phase approach by allowing for independent focusing of both circular polarizations without a 50% efficiency trade-off. We demonstrate circular polarization-dependent imaging at visible wavelengths with polarization contrast greater than 20dB and efficiencies as high as 70%.
|Original language||English (US)|
|State||Published - May 8 2018|
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): CRG-1-2012-FRA-005
Acknowledgements: F.C. acknowledges financial support from KAUST (Award CRG-1-2012-FRA-005). B.G. and J.P.B.M. acknowledge financial support from Air Force Office of Scientific Research (#FA9550-14-1-0389 and FA9550-16-1-0156). N.A.R. acknowledges financial support from NSF Graduate Research Fellowship Program (GRFP #DGE1144152). R.C.D. acknowledges financial support from the Charles Stark Draper Laboratory. This work was performed in part at the Center for Nanoscale Systems (CNS), a member of the National Nanotechnology Coordinated Infrastructure (NNCI), which is supported by the National Science Foundation under NSF award No. 1541959. CNS is part of Harvard University.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.