Ultrahigh Q-Guided Resonance Sensor Empowered by Near Merging Bound States in the Continuum

Zhiran Liu; Yi Zhou; Zhihe Guo; Xuyang Zhao; Man Luo; Yuxiang Li; Xiang Wu

doi:10.3390/photonics9110852

Photonics (Nov 2022)

Ultrahigh Q-Guided Resonance Sensor Empowered by Near Merging Bound States in the Continuum

Zhiran Liu,
Yi Zhou,
Zhihe Guo,
Xuyang Zhao,
Man Luo,
Yuxiang Li,
Xiang Wu

Affiliations

Zhiran Liu: Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Yi Zhou: Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Zhihe Guo: Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Xuyang Zhao: Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Man Luo: Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Yuxiang Li: Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Xiang Wu: Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China

DOI: https://doi.org/10.3390/photonics9110852
Journal volume & issue: Vol. 9, no. 11
p. 852

Abstract

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Bound states in the continuum (BICs) have attracted a lot of interest in the field of nanophotonics, and provide an important physical mechanism to realize high quality (Q) factor resonance. However, in practice, manufacturing error will greatly affect the Q factor. In this paper, we propose an asymmetric metasurface supporting near merging BIC under normal incidence. Such near merging BIC can achieve a higher Q factor (>107) than common structures (Q ~ 105) with the same degree of asymmetry in the structure. Moreover, the near merging BICs also show higher surface sensitivity than other resonant modes. Our work provides a promising approach for the realization of a high-performance biosensing platform.

Published in Photonics

ISSN: 2304-6732 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: http://www.mdpi.com/journal/photonics

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