title: Guided modes in magneto-optical waveguides and the role in resonant transmission.
abstract: 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.
authors.affiliation: MOE Key Laboratory of Weak-Light Nonlinear Photonics, School of Physics, Nankai University, Tianjin 300071, China.
authors.forename: Teng-Fei
authors.initials: TF
authors.lastname: Li
authors.forename: Tian-Jing
authors.initials: TJ
authors.lastname: Guo
authors.forename: Hai-Xu
authors.initials: HX
authors.lastname: Cui
authors.forename: Mu
authors.initials: M
authors.lastname: Yang
authors.forename: Ming
authors.initials: M
authors.lastname: Kang
authors.forename: Qing-Hua
authors.initials: QH
authors.lastname: Guo
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008280:Magnetics / Q000295:instrumentation*; D008962:Models, Theoretical; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D014159:Transducers