Fano resonance of dielectric linear trimer for polarization-direction sensing

Yi Ran Wang; Cui Cui Lu; Guo Yan Dong

doi:10.1117/12.3083869

Fano resonance of dielectric linear trimer for polarization-direction sensing

Yi Ran Wang
, Cui Cui Lu^*
, Guo Yan Dong^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A polarization-direction sensor based on a linear trimer of high-index CaTiO₃ ceramic cubes is proposed, utilizing electric dipole (ED) resonance coupling to induce strong Fano resonances. Compared to single particles, the trimer exhibits enhanced near-field confinement, pronounced Fano asymmetry, and greater sensitivity to the polarization angle θ between the trimer axis and the incident wave. Simulations confirm monotonic changes in resonance features with θ, and the extracted Fano parameter q varies linearly with cos2θ, enabling multi-parameter sensing. The device's simple geometry, strong polarization response, and tunability offer promising potential for compact photonic sensing and polarization-resolved applications.

Original language	English
Title of host publication	AOPC 2025
Subtitle of host publication	Micro-Nano Optics
Editors	Min Qiu
Publisher	SPIE
ISBN (Electronic)	9781510698680
DOIs	https://doi.org/10.1117/12.3083869
Publication status	Published - 28 Oct 2025
Externally published	Yes
Event	AOPC 2025: Micro-Nano Optics - Beijing, China Duration: 24 Jun 2025 → 27 Jun 2025

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	13962
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	AOPC 2025: Micro-Nano Optics
Country/Territory	China
City	Beijing
Period	24/06/25 → 27/06/25

Keywords

Coupled Mie resonance
Fano resonance
Near-field enhancement
Polarization-direction sensing

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10.1117/12.3083869

Cite this

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title = "Fano resonance of dielectric linear trimer for polarization-direction sensing",

abstract = "A polarization-direction sensor based on a linear trimer of high-index CaTiO3 ceramic cubes is proposed, utilizing electric dipole (ED) resonance coupling to induce strong Fano resonances. Compared to single particles, the trimer exhibits enhanced near-field confinement, pronounced Fano asymmetry, and greater sensitivity to the polarization angle θ between the trimer axis and the incident wave. Simulations confirm monotonic changes in resonance features with θ, and the extracted Fano parameter q varies linearly with cos2θ, enabling multi-parameter sensing. The device's simple geometry, strong polarization response, and tunability offer promising potential for compact photonic sensing and polarization-resolved applications.",

keywords = "Coupled Mie resonance, Fano resonance, Near-field enhancement, Polarization-direction sensing",

author = "Wang, \{Yi Ran\} and Lu, \{Cui Cui\} and Dong, \{Guo Yan\}",

note = "Publisher Copyright: {\textcopyright} 2025 SPIE.; AOPC 2025: Micro-Nano Optics ; Conference date: 24-06-2025 Through 27-06-2025",

year = "2025",

month = oct,

day = "28",

doi = "10.1117/12.3083869",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Min Qiu",

booktitle = "AOPC 2025",

address = "United States",

}

Fano resonance of dielectric linear trimer for polarization-direction sensing. / Wang, Yi Ran; Lu, Cui Cui; Dong, Guo Yan.
AOPC 2025: Micro-Nano Optics. ed. / Min Qiu. SPIE, 2025. 139620H (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 13962).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Fano resonance of dielectric linear trimer for polarization-direction sensing

AU - Wang, Yi Ran

AU - Lu, Cui Cui

AU - Dong, Guo Yan

PY - 2025/10/28

Y1 - 2025/10/28

N2 - A polarization-direction sensor based on a linear trimer of high-index CaTiO3 ceramic cubes is proposed, utilizing electric dipole (ED) resonance coupling to induce strong Fano resonances. Compared to single particles, the trimer exhibits enhanced near-field confinement, pronounced Fano asymmetry, and greater sensitivity to the polarization angle θ between the trimer axis and the incident wave. Simulations confirm monotonic changes in resonance features with θ, and the extracted Fano parameter q varies linearly with cos2θ, enabling multi-parameter sensing. The device's simple geometry, strong polarization response, and tunability offer promising potential for compact photonic sensing and polarization-resolved applications.

AB - A polarization-direction sensor based on a linear trimer of high-index CaTiO3 ceramic cubes is proposed, utilizing electric dipole (ED) resonance coupling to induce strong Fano resonances. Compared to single particles, the trimer exhibits enhanced near-field confinement, pronounced Fano asymmetry, and greater sensitivity to the polarization angle θ between the trimer axis and the incident wave. Simulations confirm monotonic changes in resonance features with θ, and the extracted Fano parameter q varies linearly with cos2θ, enabling multi-parameter sensing. The device's simple geometry, strong polarization response, and tunability offer promising potential for compact photonic sensing and polarization-resolved applications.

KW - Coupled Mie resonance

KW - Fano resonance

KW - Near-field enhancement

KW - Polarization-direction sensing

UR - https://www.scopus.com/pages/publications/105025742349

U2 - 10.1117/12.3083869

DO - 10.1117/12.3083869

M3 - Conference contribution

AN - SCOPUS:105025742349

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - AOPC 2025

A2 - Qiu, Min

PB - SPIE

T2 - AOPC 2025: Micro-Nano Optics

Y2 - 24 June 2025 through 27 June 2025

ER -

Fano resonance of dielectric linear trimer for polarization-direction sensing

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Keywords

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