Experimental demonstration of merging quasi-BICs in photonic crystal slabs

Bingtao Li; Shiyu Liu; Wenjun Li; Zheng-Da Hu; Yun Zhu; Jicheng Wang; Yuting Yang; Xiaopeng Shen

Materials & Design (Sep 2024)

Experimental demonstration of merging quasi-BICs in photonic crystal slabs

Bingtao Li,
Shiyu Liu,
Wenjun Li,
Zheng-Da Hu,
Yun Zhu,
Jicheng Wang,
Yuting Yang,
Xiaopeng Shen

Affiliations

Bingtao Li: School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
Shiyu Liu: School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
Wenjun Li: Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
Zheng-Da Hu: School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
Yun Zhu: School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
Jicheng Wang: School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China; Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China; Corresponding authors at: School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China (J. Wang) and School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China (Y. Yang).
Yuting Yang: School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China; State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China; Corresponding authors at: School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China (J. Wang) and School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China (Y. Yang).
Xiaopeng Shen: School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China

Journal volume & issue: Vol. 245
p. 113263

Abstract

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Merging bound states in the continuum (BICs) and avoided crossing of resonances (ACR) are promising theoretical approaches to greatly enhance the quality (Q) factors of quasi-BICs in reciprocal space. We observe the phenomena of merging BICs and ACR in millimeter-sized C4v symmetry photonic crystal structures. The ACR at Γ point is obtained in the variation of the structural parameter. In off-Γ region, the merging BICs at arbitrary locations are observed in the experimental measurements. The findings offer a pathway to high-performance photonic devices with potential applications in optoelectronics and microwave experimentation.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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