Magnetic control of waveguide modes of Bragg structures

19th International Youth School on Coherent Optics and Optical Spectroscopy

Sylgacheva, D.A.^1,2 ; Khokhlov, N.E.^1,2 ; Kalish, A.N.^1,2 ; Belotelov, V.I.^1,2

Lomonosov Moscow State University, Moscow

119991, Russia^1

Russian Quantum Center, Skolkovo, Moscow Region

143025, Russia^2

关键词: Bragg structure;    External magnetic field;    Magnetic control;    Magnetic layers;    Magnetic photonic crystals;    Magnetophotonic crystals;    Nonreciprocity;    Waveguide structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/714/1/012016/pdf
DOI  :  10.1088/1742-6596/714/1/012016

来源: IOP

【 摘 要 】

We present the study of the waveguide modes of one-dimensional magnetic photonic crystals with in-plane-magnetized layers. There is a magneto-optical effect of nonreciprocity for the TM-modes propagating along the layers perpendicularly to the magnetization. Due to the non-reciprocity the phase velocity of the modes changes with magnetization reversal. Comparison of the effect in the non-magnetic photonic crystal with additional magnetic layer on top and a magnetophotonic crystal with altering magnetic layers shows that the effect is greater in the first case due to the higher asymmetry of the claddings of the magnetic layer. This effect is important for the light modulation with external magnetic field in waveguide structures and may be used for design of novel types of the magneto-optical devices, sensors of magnetic field or biosensors.