Author:
Gao Siyuan,Ota Yasutomo,Liu Tianji,Tian Feng,Iwamoto Satoshi
Abstract
Abstract
We report the design of an ultrathin Faraday rotator consisting of a silicon photonic crystal (PhC) slab on a bismuth-substituted yttrium iron garnet (Bi:YIG) thin film. By directing light into guided modes in the Bi:YIG layer via diffraction in the PhC layer, we numerically demonstrate a Faraday rotation angle of ∼45° at a telecom wavelength with a Bi:YIG layer thickness of only ∼500 nm. This structure permits a high light transmittance of about 70%, enabled by electromagnetically induced transparency. The proposed design only requires nanopatterning of the Si layer, providing a viable route to practical ultrathin Faraday rotators.
Funder
JST CREST
JST FOREST Program
Nippon Sheet Glass Foundation for Materials Science and Engineering
Japan Society for the Promotion of Science
Subject
General Physics and Astronomy,General Engineering