Li Teng-Fei, Guo Tian-Jing, Cui Hai-Xu, Yang Mu, Kang Ming, Guo Qing-Hua, Chen Jing
MOE Key Laboratory of Weak-Light Nonlinear Photonics, School of Physics, Nankai University, Tianjin 300071, China.
Opt Express. 2013 Apr 22;21(8):9563-72. doi: 10.1364/OE.21.009563.
Magneto-optical (MO) effect can break the reciprocal propagation of an optical wave along a MO-metal interface. We show that this nonreciprocal property also influences the guided modes in metal-MO-metal waveguides. Especially, the field profiles of the guided modes are neither symmetric nor anti-symmetric, but asymmetric. We then study the resonant optical transmission through a thin metal film with subwavelength MO slits. Magnetic field changes the transmission spectra of the structure, and a MO-induced transparent window is open, where the MO medium becomes extremely anisotropic. The guided-mode mediated high transmission is associated with an asymmetric field distribution and a circling energy flux.
磁光（MO）效应可以打破光波沿MO-金属界面的互易传播。我们表明，这种非互易特性也会影响金属-MO-金属波导中的导模。特别是，导模的场分布既不对称也不反对称，而是非对称的。然后我们研究了通过具有亚波长MO狭缝的薄金属膜的共振光传输。磁场改变了结构的透射光谱，并且打开了一个MO诱导的透明窗口，其中MO介质变得极其各向异性。导模介导的高透射率与不对称的场分布和循环的能量通量有关。
