Abstract

Weintroduce a class of critical states which are embedded in the continuum (CSC) of a one-dimensional optical waveguide array with one non-Hermitian defect. These states are on the verge of being fractal and have real propagation constants. They emerge at a phase transition which is driven by the imaginary refractive index of the defective waveguide and it is accompanied by a mode segregation which reveals analogies with the Dicke super-radiance. Below this point the states are extended while above it they evolve to exponentially localized modes. An addition of a background gain or loss can turn these localized states into bound states in the continuum.

Meeting Name

CLEO: QELS - Fundamental Science (2015: May 10-15, San Jose, CA)

Department(s)

Physics

Keywords and Phrases

Critical State; Hermitians; Optical Waveguide Arrays; Optical Waveguides

International Standard Book Number (ISBN)

9781557529688

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2015 Optical Society of America (OSA), All rights reserved.

Included in

Physics Commons

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