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Compact surface Fano states embedded in the continuum of waveguide arrays. | LitMetric

Compact surface Fano states embedded in the continuum of waveguide arrays.

Phys Rev Lett

Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, Australia.

Published: December 2013

AI Article Synopsis

Article Abstract

We describe theoretically and observe experimentally the formation of a surface state in a semi-infinite waveguide array with a side-coupled waveguide, designed to simultaneously achieve Fano and Fabry-Perot resonances. We demonstrate that the surface mode is compact, with all energy concentrated in a few waveguides at the edge and no field penetration beyond the side-coupled waveguide position. Furthermore, we show that by broadening the spectral band in the rest of the waveguide array it is possible to suppress exponentially localized modes, while the Fano state having the eigenvalue embedded in the continuum is preserved.

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Source
http://dx.doi.org/10.1103/PhysRevLett.111.240403DOI Listing

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