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arXiv physics/0606200physics.optics
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磁光子晶体中高阶波导模耦合对偏振旋转的增强

Polarization rotation enhancement by high-order waveguide mode coupling in magnetophotonic crystals

Miguel Levy, Rong Li

摘要:

磁性薄膜中光子带隙光通道中的模间耦合用于利用法拉第效应实现横电(TE)到横磁(TM)模式转换。的基本机制被追溯到光栅耦合常数的模式折射率和模式分布的传播光束,波导传播中出现的功能,是不存在于垂直入射堆叠磁光子晶体的依赖。作为光子带隙结构的结果,在第一和第二阶中观察到带边附近的偏振的大的变化。线性双折射的极端敏感性存在于二阶。

英文摘要:

Inter-modal coupling in photonic bandgap optical channels in magnetic films is used to leverage the transverse-electric (TE) to transverse-magnetic (TM) mode conversion due to the Faraday Effect. The underlying mechanism is traced to the dependence of the grating coupling-constant on the modal refractive index and the mode profile of the propagating beam, a feature that arises in waveguide propagation and is not present in normal-incidence stack magnetophotonic crystals. Large changes in polarization near the band edges are observed in first and second orders as a result of the photonic bandgap structure. Extreme sensitivity to linear birefringence exists in second order.

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