Title

Nonlinear Waves In Subwavelength Waveguide Arrays: Evanescent Bands And The "Phoenix Soliton"

Abstract

We formulate wave propagation in arrays of subwavelength waveguides with sharp index contrasts and demonstrate the collapse of bands into evanescent modes and lattice solitons with superluminal phase velocity. We find a self-reviving soliton ("phoenix soliton") comprised of coupled forward- and backward-propagating light, originating solely from evanescent bands. In the linear regime, all Bloch waves comprising this beam decay, whereas a proper nonlinearity assembles them into a propagating self-trapped beam. Finally, we simulate the dynamics of such a beam and observe breakup into temporal pulses, indicating a new kind of slow-light gap solitons, trapped in time and in one transverse dimension. © 2009 The American Physical Society.

Publication Date

4-23-2009

Publication Title

Physical Review Letters

Volume

102

Issue

16

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevLett.102.163902

Socpus ID

65549108995 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/65549108995

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