Gallium phosphide nanoantenna controls enhanced single-molecule fluorescence

Yatao Yang; Yongxian Yan; Yifan Wang; Weiren Cheng; Qiancheng Zhao; Yi Li

doi:10.1117/12.2689146

28 November 2023 Gallium phosphide nanoantenna controls enhanced single-molecule fluorescence

Yatao Yang, Yongxian Yan, Yifan Wang, Weiren Cheng, Qiancheng Zhao, Yi Li

Proceedings Volume 12773, Nanophotonics and Micro/Nano Optics IX; 127730W (2023) https://doi.org/10.1117/12.2689146
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

We propose a design for all-dielectric (gallium phosphide, GaP) nanoantenna to enhance single molecule fluorescence. The slotted GaP nanodisk exhibits strong scattering and limited optical loss, resulting in more than 30× excitation enhancement growth at the resonance position. Our proposed scheme also enables precise manipulation of the local density of optical states, leading to a nearly one order of magnitude increments in quantum yield for individual dye (original quantum yield is 0.01) and 12× emission enhancement. We benchmark the overall fluorescent enhancement for the four commercial dye colors (original quantum yield is 0.3) and achieved one-order of enhancement higher than commercialized zero-mode waveguide (ZMW) in the simulation. Our GaP-based design not only provides a solution for next-generation chips for DNA and protein sequencing, but also contributes to single-entity interactions, portable fluorescence detection, and integrated devices with quantum light sources.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yatao Yang, Yongxian Yan, Yifan Wang, Weiren Cheng, Qiancheng Zhao, and Yi Li "Gallium phosphide nanoantenna controls enhanced single-molecule fluorescence", Proc. SPIE 12773, Nanophotonics and Micro/Nano Optics IX, 127730W (28 November 2023); https://doi.org/10.1117/12.2689146

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