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Opt Express. 2010 Jan 18;18(2):1762-76. doi: 10.1364/OE.18.001762.

Band splitting and modal dispersion induced by symmetry braking in coupled-resonator slowlight waveguide structures.

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1
Department of Electrical Engineering, Tel Aviv University, Tel Aviv, Israel. kobys@eng.tau.ac.il

Abstract

We study the dispersion relations in slow-light waveguide structures consisting of coupled microdisk resonators. A group theoretical analysis of the symmetry properties of the propagating modes reveals a fundamental phenomenon: The degeneracy of the CW and CCW rotating modes is removed, giving rise to two distinct transmission bands. This effect induces symmetry-based dispersion which may limit the usable bandwidth of such structures. The properties of this band splitting and its impact on CROW performance for optical communications are studied in detail.

PMID:
20174004
[Indexed for MEDLINE]
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