Abstract

The current study was undertaken to design a voltage-driven magneto-plasmonic device analog to a field effect transistor (FET) but alternatively proposed for a transverse magneto-optical Kerr effect (TMOKE) response. The suggested structure is a glass/Au/NiFe/dielectric/${\mathrm{WS}}_2$ multilayer with very similar constituted layers to the substrate/metal-gate/dielectric/conductive-channel FET design. Here, a Au/NiFe bilayer is of metal that Au is individually working as a plasmonic excitation layer and NiFe is a ferromagnetic layer for a TMOKE response. The ${\mathrm{WS}}_2$ monolayer is a conductive-channel layer separated from the metal-gate layer via a dielectric layer. The ${\mathrm{WS}}_2$ refractive index and absorption/reflection can be controlled upon applying voltage to the Au/NiFe metal-gate bilayer. Light reflection and TMOKE responses from this structure in a Kretschmann configuration were determined based on a transfer matrix method. Significant change in TMOKE was predicted as the result of large changes in the refractive index of the ${\mathrm{WS}}_2$ monolayer versus voltage as recently reported by Yu et al. [Nano Lett. 17, 3613 (2017) [CrossRef]  ]. Dielectric layers having different thicknesses were examined to increase the TMOKE response and reduce the reflectance. The results offer design options for achieving miniaturized electrically driven magneto-optical response elements.

© 2017 Optical Society of America

Enhanced magneto-optical Kerr effect and index sensitivity in Au/Fe_xCo_1-x magnetoplasmonic transducers

Haipeng Lu, Chuan Liu, Jun Qin, Chuangtang Wang, Yan Zhang, Longjiang Deng, and Lei Bi
Photon. Res. 5(5) 385-390 (2017)

Transverse magneto-optical Kerr effect in subwavelength dielectric gratings

Ivan S. Maksymov, Jessica Hutomo, and Mikhail Kostylev
Opt. Express 22(7) 8720-8725 (2014)

Enhancement of magneto-optical Kerr effect by surface plasmons in trilayer structure consisting of double-layer dielectrics and ferromagnetic metal

Terunori Kaihara, Takeaki Ando, Hiromasa Shimizu, Vadym Zayets, Hidekazu Saito, Koji Ando, and Shinji Yuasa
Opt. Express 23(9) 11537-11555 (2015)

Spectral dependence of the magnetic modulation of surface plasmon polaritons in permalloy/noble metal films

V. G. Kravets, P. Yu. Kurioz, and L. V. Poperenko
J. Opt. Soc. Am. B 31(8) 1836-1844 (2014)

Surface plasmon-induced enhancement of the magneto-optical Kerr effect in magnetoplasmonic heterostructures

Y. Demidenko, D. Makarov, O. G. Schmidt, and V. Lozovski
J. Opt. Soc. Am. B 28(9) 2115-2122 (2011)