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Published November 4, 2016 | Published + Supplemental Material
Journal Article Open

Metawaveguide for Asymmetric Interferometric Light-Light Switching


Light-light switching typically requires strong nonlinearity where intense laser fields route and direct data flows of weak power, leading to a high power consumption that limits its practical use. Here we report an experimental demonstration of a metawaveguide that operates exactly in the opposite way in a linear regime, where an intense laser field is interferometrically manipulated on demand by a weak control beam with a modulation extinction ratio up to approximately 60 dB. This asymmetric control results from operating near an exceptional point of the scattering matrix, which gives rise to intrinsic asymmetric reflections of the metawaveguide through delicate interplay between index and absorption. The designed metawaveguide promises low-power interferometric light-light switching for the next generation of optical devices and networks.

Additional Information

© 2016 American Physical Society. (Received 4 May 2016; published 31 October 2016) The work is supported by the U.S. Army Research Office (Grant No. W911NF-15-1-0152) and National Science Foundation (Grant No. DMR-1506884). L. G. acknowledges the support by National Science Foundation (Grant No. DMR-1506987). W. S. F. and A. S. acknowledge Boeing for their support under their SRDMA program and also thank the NSF CIAN Engineering Research Center (ERC) (Grant No. EEC-0812072). H. Z., W. S. F., and J. Y. contributed equally to this work.

Attached Files

Published - PhysRevLett.117.193901.pdf

Supplemental Material - PRL_Supplementary_Material_0823.pdf


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