Journal article
Light propagation with phase discontinuities: Generalized laws of reflection and refraction
N Yu, P Genevet, MA Kats, F Aieta, JP Tetienne, F Capasso, Z Gaburro
Science | Published : 2011
Abstract
Conventional optical components rely on gradual phase shifts accumulated during light propagation to shape light beams. New degrees of freedom are attained by introducing abrupt phase changes over the scale of the wavelength. A two-dimensional array of optical resonators with spatially varying phase response and subwavelength separation can imprint such phase discontinuities on propagating light as it traverses the interface between two media. Anomalous reflection and refraction phenomena are observed in this regime in optically thin arrays of metallic antennas on silicon with a linear phase variation along the interface, which are in excellent agreement with generalized laws derived from Fe..
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Awarded by European Commission
Funding Acknowledgements
The authors acknowledge helpful discussion with J. Lin, R. Blanchard, and A. Belyanin. The authors acknowledge support from the National Science Foundation (NSF), Harvard Nanoscale Science and Engineering Center (NSEC) under contract NSF/PHY 06-46094, and the Center for Nanoscale Systems (CNS) at Harvard University. This work was supported in part by the Defense Advanced Research Projects Agency (DARPA) N/MEMS S&T Fundamentals program under grant N66001-10-1-4008 issued by the Space and Naval Warfare Systems Center Pacific (SPAWAR). Z.G. acknowledges funding from the European Communities Seventh Framework Programme (FP7/2007-2013) under grant agreement PIOF-GA-2009-235860. M.A.K. is supported by NSF through a Graduate Research Fellowship. Harvard CNS is a member of the National Nanotechnology Infrastructure Network. The Lumerical (Vancouver, BC, Canada) FDTD simulations in this Research Article were run on the Odyssey cluster supported by the Harvard Faculty of Arts and Sciences Sciences Division Research Computing Group.