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Phys Rev Lett. 2008 Sep 12;101(11):113902. Epub 2008 Sep 11.

Optical Tamm states in one-dimensional magnetophotonic structures.

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1
Department of Electrical and Electronic Engineering, Toyohashi University of Technology, Hibari-Ga-Oka, Tempaku, Toyohashi 441-8580, Japan.

Abstract

We demonstrate the existence of a spectrally narrow localized surface state, the so-called optical Tamm state, at the interface between one-dimensional magnetophotonic and nonmagnetic photonic crystals. The state is spectrally located inside the photonic band gaps of each of the photonic crystals comprising this magnetophotonic structure. This state is associated with a sharp transmission peak through the sample and is responsible for the substantial enhancement of the Faraday rotation for the corresponding wavelength. The experimental results are in excellent agreement with the theoretical predictions.

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