TY - JOUR
T1 - Faraday rotator based on a silicon photonic crystal slab on a bismuth-substituted yttrium iron garnet thin film
AU - Gao, Siyuan
AU - Ota, Yasutomo
AU - Liu, Tianji
AU - Tian, Feng
AU - Iwamoto, Satoshi
N1 - Publisher Copyright:
© 2023 The Japan Society of Applied Physics
PY - 2023/7/1
Y1 - 2023/7/1
N2 - 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.
AB - 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.
KW - bound state in the continuum
KW - electromagnetically induced transparency
KW - guided mode resonance
KW - magneto-optical metasurface
UR - https://www.scopus.com/pages/publications/85165512604
UR - https://www.scopus.com/pages/publications/85165512604#tab=citedBy
U2 - 10.35848/1882-0786/acdc81
DO - 10.35848/1882-0786/acdc81
M3 - Article
AN - SCOPUS:85165512604
SN - 1882-0778
VL - 16
JO - Applied Physics Express
JF - Applied Physics Express
IS - 7
M1 - 072003
ER -