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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 36, Iss. 22 — Nov. 15, 2011
  • pp: 4359–4361

Unidirectional optical Bloch oscillations in asymmetric waveguide arrays

Pradeep Kumar and Miguel Levy  »View Author Affiliations


Optics Letters, Vol. 36, Issue 22, pp. 4359-4361 (2011)
http://dx.doi.org/10.1364/OL.36.004359


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Abstract

We present an analytical proof of the existence of unidirectional optical Bloch oscillations in a waveguide array system. It is shown that the presence of nonreciprocity in the system allows for a complete normal-mode dephasing in one of the propagation directions, resulting in a unidirectional breakdown in Bloch oscillations. A model system consisting of an array of transversely magnetized asymmetric Si / SiO 2 waveguides with a magneto-optic cover layer is presented. Large index contrasts between film and cover are critical for practical realizations.

© 2011 Optical Society of America

OCIS Codes
(000.1600) General : Classical and quantum physics
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(230.7370) Optical devices : Waveguides

ToC Category:
Integrated Optics

History
Original Manuscript: August 2, 2011
Revised Manuscript: October 4, 2011
Manuscript Accepted: October 4, 2011
Published: November 11, 2011

Citation
Pradeep Kumar and Miguel Levy, "Unidirectional optical Bloch oscillations in asymmetric waveguide arrays," Opt. Lett. 36, 4359-4361 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-22-4359

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