Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1998-12-26
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages, 5 figures
Scientific paper
We demonstrate that the boundary of two optical isomers with opposite directions of the gyration vectors (both parallel to boundary) can support propagation of electromagnetic wave in the direction perpendicular to the gyration axes (Cotton-Mouton geometry). The components of electromagnetic field in this wave decay exponentially into both media. The characteristic decay length is of the order of the Faraday rotation length for the propagation along the gyration axis. The remarkable property of the boundary wave is its chirality. Namely, the wave can propagate only in one direction determined by the relative sign of non-diagonal components of the dielectric tensor in contacting media. We find the dispersion law of the boundary wave for the cases of abrupt and smooth boundaries. We also study the effect of asymmetry between the contacting media on the boundary wave and generalize the result to the case of two parallel boundaries. Finally we consider the arrangement when the boundaries form a random network. We argue that at a point, when this network percolates, the corresponding boundary waves undergo quantum delocalization transition, similar to the quantum Hall transition.
Raikh Mikhail E.
Zhukov L. E.
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