Enhanced Faraday Rotation and Transmittance in a Tri-layer Magnetic Plasma Structure

Junsheng Li; Jian Tang; Yunhui Jiang; Yuheng Pan

doi:10.1109/LPT.2026.3708508

Enhanced Faraday Rotation and Transmittance in a Tri-layer Magnetic Plasma Structure

Junsheng Li (Co-first Author)
, Jian Tang^* (Co-first Author)
, Yunhui Jiang (Co-first Author)
, Yuheng Pan

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

We investigate the magneto-optical and optical characteristics of a tri-layer magnetic plasma structure (TMPS) consisting of a Bi:YIG layer sandwiched between two identical Ag layers. Using the 4 × 4 transfer matrix method (TMM) and the finite-difference time-domain (FDTD) method, we demonstrate that precise control of layer thicknesses enables simultaneous strong Faraday rotation (FR) and high transmittance. Analytical solutions and electric field distributions reveal that resonant tunneling and Fabry-Pérot (F-P) cavity formation are responsible. Based on this mechanism, we design a Ag/Bi:YIG/Ag nano Faraday rotator with FR > 45° at three wavelengths (450.6, 526.5, 632.8 nm), providing an integrable approach for arbitrary wavelengths. © 2026 IEEE.

Original language	English
Pages (from-to)	1656-1659
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	38
Issue number	2
Online published	1 Jul 2026
DOIs	https://doi.org/10.1109/LPT.2026.3708508
Publication status	Online published - 1 Jul 2026
Externally published	Yes

Research Keywords

Fabry–Pérot cavity
Faraday rotation
Magneto-optical effect
wavelength 632.8 nm

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10.1109/LPT.2026.3708508

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title = "Enhanced Faraday Rotation and Transmittance in a Tri-layer Magnetic Plasma Structure",

abstract = "We investigate the magneto-optical and optical characteristics of a tri-layer magnetic plasma structure (TMPS) consisting of a Bi:YIG layer sandwiched between two identical Ag layers. Using the 4 × 4 transfer matrix method (TMM) and the finite-difference time-domain (FDTD) method, we demonstrate that precise control of layer thicknesses enables simultaneous strong Faraday rotation (FR) and high transmittance. Analytical solutions and electric field distributions reveal that resonant tunneling and Fabry-P{\'e}rot (F-P) cavity formation are responsible. Based on this mechanism, we design a Ag/Bi:YIG/Ag nano Faraday rotator with FR > 45° at three wavelengths (450.6, 526.5, 632.8 nm), providing an integrable approach for arbitrary wavelengths. {\textcopyright} 2026 IEEE.",

keywords = "Fabry–P{\'e}rot cavity, Faraday rotation, Magneto-optical effect, wavelength 632.8 nm",

author = "Junsheng Li and Jian Tang and Yunhui Jiang and Yuheng Pan",

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doi = "10.1109/LPT.2026.3708508",

language = "English",

volume = "38",

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journal = "IEEE Photonics Technology Letters",

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Enhanced Faraday Rotation and Transmittance in a Tri-layer Magnetic Plasma Structure. / Li, Junsheng (Co-first Author); Tang, Jian (Co-first Author); Jiang, Yunhui (Co-first Author) et al.
In: IEEE Photonics Technology Letters, Vol. 38, No. 2, 01.11.2026, p. 1656-1659.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Enhanced Faraday Rotation and Transmittance in a Tri-layer Magnetic Plasma Structure

AU - Li, Junsheng

AU - Tang, Jian

AU - Jiang, Yunhui

AU - Pan, Yuheng

PY - 2026/7/1

Y1 - 2026/7/1

N2 - We investigate the magneto-optical and optical characteristics of a tri-layer magnetic plasma structure (TMPS) consisting of a Bi:YIG layer sandwiched between two identical Ag layers. Using the 4 × 4 transfer matrix method (TMM) and the finite-difference time-domain (FDTD) method, we demonstrate that precise control of layer thicknesses enables simultaneous strong Faraday rotation (FR) and high transmittance. Analytical solutions and electric field distributions reveal that resonant tunneling and Fabry-Pérot (F-P) cavity formation are responsible. Based on this mechanism, we design a Ag/Bi:YIG/Ag nano Faraday rotator with FR > 45° at three wavelengths (450.6, 526.5, 632.8 nm), providing an integrable approach for arbitrary wavelengths. © 2026 IEEE.

AB - We investigate the magneto-optical and optical characteristics of a tri-layer magnetic plasma structure (TMPS) consisting of a Bi:YIG layer sandwiched between two identical Ag layers. Using the 4 × 4 transfer matrix method (TMM) and the finite-difference time-domain (FDTD) method, we demonstrate that precise control of layer thicknesses enables simultaneous strong Faraday rotation (FR) and high transmittance. Analytical solutions and electric field distributions reveal that resonant tunneling and Fabry-Pérot (F-P) cavity formation are responsible. Based on this mechanism, we design a Ag/Bi:YIG/Ag nano Faraday rotator with FR > 45° at three wavelengths (450.6, 526.5, 632.8 nm), providing an integrable approach for arbitrary wavelengths. © 2026 IEEE.

KW - Fabry–Pérot cavity

KW - Faraday rotation

KW - Magneto-optical effect

KW - wavelength 632.8 nm

UR - https://www.scopus.com/pages/publications/105043679933

UR - https://www.scopus.com/pages/publications/105043679933#tab=impact

U2 - 10.1109/LPT.2026.3708508

DO - 10.1109/LPT.2026.3708508

M3 - RGC 21 - Publication in refereed journal

SN - 1041-1135

VL - 38

SP - 1656

EP - 1659

JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

IS - 2

ER -

Enhanced Faraday Rotation and Transmittance in a Tri-layer Magnetic Plasma Structure

Abstract

Research Keywords

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