Abstract

We introduce a nanoplasmonic isolator that consists of a cylindrical resonator placed close to a metal-dielectric-metal (MDM) waveguide. The material filling the waveguide and resonator is a magneto-optical (MO) material, and the structure is under an externally applied static magnetic field. We theoretically investigate the properties of the structure and show that the cavity mode without MO activity splits into two modes when the MO activity is present. In addition, we find that the presence of the MDM waveguide leads to a second resonance due to the geometrical asymmetry caused by the existence of the waveguide. We also show that, when MO activity is present, the cavity becomes a traveling wave resonator. Thus, the transmission of the structure depends on the direction of the incident light, and the proposed structure operates as an optical isolator.

© 2021 Chinese Laser Press

Highly compact magneto-optical switches for metal-dielectric-metal plasmonic waveguides

Ali Haddadpour, Vahid Foroughi Nezhad, Zongfu Yu, and Georgios Veronis
Opt. Lett. 41(18) 4340-4343 (2016)

Review of integrated magneto-optical isolators with rare-earth iron garnets for polarization diverse and magnet-free isolation in silicon photonics [Invited]

Karthik Srinivasan and Bethanie J. H. Stadler
Opt. Mater. Express 12(2) 697-716 (2022)

Magneto-optical materials and designs for integrated TE- and TM-mode planar waveguide isolators: a review [Invited]

Karthik Srinivasan and Bethanie J. H. Stadler
Opt. Mater. Express 8(11) 3307-3318 (2018)

Modeling of a novel InP-based monolithically integrated magneto-optical waveguide isolator

K. Postava, M. Vanwolleghem, D. Van Thourhout, R. Baets, S. Visnovský, P. Beauvillain, and J. Pistora
J. Opt. Soc. Am. B 22(1) 261-273 (2005)

Waveguide magneto-optical devices for photonics integrated circuits [Invited]

Yuya Shoji and Tetsuya Mizumoto
Opt. Mater. Express 8(8) 2387-2394 (2018)