Exceptional point enhanced nanoparticle detection in deformed Reuleaux-triangle microcavity-Reference-Cited by-同舟云学术

Exceptional point enhanced nanoparticle detection in deformed Reuleaux-triangle microcavity

Published:2024-08-08 Issue:1 Volume:17 Page:
ISSN:2095-2767
Container-title:Frontiers of Optoelectronics
language:en
Short-container-title:Front. Optoelectron.

Author:

Fei Jinhao,Zhang Xiaobei,Zhang Qi,Yang Yong,Wang Zijie,Deng Chuanlu,Huang Yi,Wang Tingyun

Abstract

AbstractIn this paper, we propose a deformed Reuleaux-triangle resonator (RTR) to form exceptional point (EP) which results in the detection sensitivity enhancement of nanoparticle. After introducing single nanoparticle to the deformed RTR at EP, frequency splitting obtains an enhancement of more than 6 times compared with non-deformed RTR. In addition, EP induced a result that the far field pattern of chiral mode responses significantly to external perturbation, corresponding to the change in internal chirality. Therefore, single nanoparticle with far distance of more than 4000 nm can be detected by measuring the variation of far field directional emission. Compared to traditional frequency splitting, the far field pattern produced in deformed RTR provides a cost-effective and convenient path to detect single nanoparticle at a long distance, without using tunable laser and external coupler. Our structure indicates great potential in high sensitivity sensor and label-free detector. Graphical Abstract

Publisher

Springer Science and Business Media LLC

Link

https://link.springer.com/content/pdf/10.1007/s12200-024-00131-5.pdf

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