Photonic band mixing in linear chains of optically coupled micro-spheres

Details Photonic band mixing in linear chains of optically coupled micro-spheres Photonic band mixing in linear chains of optically coupled micro-spheres

2005-11-10

arxiv.org/abs/physics/0511095v1

Physics

Optics

RevTex, 28 pages, 7 Figures

Scientific paper

10.1103/PhysRevE.73.036606

The paper deals with optical excitations arising in a one-dimensional chain of identical spheres due optical coupling of whispering gallery modes (WGM). The band structure of these excitations depends significantly on the inter-mixing between WGMs characterized by different values of angular quantum number, $l$. We develop a general theory of the photonic band structure of these excitations taking these effects into account and applied it to several cases of recent experimental interest. In the case of bands originating from WQMs with the angular quantum number of the same parity, the calculated dispersion laws are in good qualitative agreement with recent experiment results. Bands resulting from hybridization of excitations resulting from whispering gallery modes with different parity of $l$ exhibits anomalous dispersion properties characterized by a gap in the allowed values of \emph{wave numbers} and divergence of group velocity.

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