Local Normal Mode Coupling and Energy Band Splitting in Elliptically Birefringent 1D Magnetophotonic Crystals - Physics > OpticsReportar como inadecuado




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Abstract: An analysis is presented of wave-vector dispersion in ellipticallybirefringent stratified magneto-optic media having one-dimensional periodicity.It is found that local normal-mode polarization-state differences betweenadjacent layers lead to mode coupling and impact the wave-vector dispersion andthe character of the Bloch states of the system. This coupling produces extraterms in the dispersion relation not present in uniform circularly birefringentmagneto-optic stratified media. Normal mode coupling lifts the degeneracy atfrequency band cross-over points under certain conditions and induces amagnetization-dependent optical band gap. This study examines the conditionsfor band gap formation in the system. It shows that such a frequency-split canbe characterized by a simple coupling parameter that depends on the relationbetween polarization states of local normal modes in adjacent layers. Thecharacter of the Bloch states and conditions for maximizing the strength of theband splitting in these systems are analyzed.



Autor: Amir A. Jalali, Miguel Levy

Fuente: https://arxiv.org/







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