On-Chip Single-Molecule Fluorescence Enhancement via Slotted Gallium Phosphide Nanodisks at Anapole States

Yang, Yatao1,2; Wang, Yifan1; Yan, Yongxian1,3; Cheng, Weiren1; Zhao, Qiancheng1; Li, Yi1

2023-07-01

10.1002/adom.202301444

ADVANCED OPTICAL MATERIALS   Impact Factor & Quartile

2195-1071

Surface-enhanced fluorescence of single emitters lies at the heart of single-molecule DNA sequencers as well as quantum light sources. The state-of-the-art metallic nanoapertures are impaled in a dilemma between enhancing radiative decays and minimizing nonradiative issues such as quenching and resistive heating. Here, lossless gallium phosphide slotted nanodisks are proposed that operate at anapole states by in-plane excitation, precisely aligning the optical "hot spots" with fluidic focuses of zeptomolar sensing volume. Unlike traditional microscopic configurations, this proposed scheme excited via butt-coupled in-plane waveguides not only exhibits averagely 12.4x excitation enhancement growth for a single emitter located in the slot, but also enables precise manipulation of the local density of optical states which gives rise to 13.2x when QY(0) = 0.003. Surprisingly, directional collection from the excitation waveguide appears in the optimal approach rather than the collection from a CMOS camera at the bottom. The overall on-chip fluorescent enhancement is benchmarked with the four dyes' colors, lowering the excitation power to 5.3% of contemporary zero-mode waveguide (ZMW) devices.

anapole states gallium phosphide nanoantennas on-chip enhanced fluorescence

SCI

English

First ; Corresponding

Ministry of Science and Technology of China[2022YFF1203400] ; National Natural Science Foundation of China[62205137] ; Guangdong Basic and Applied Basic Foundation["2021B1515120074","2023A1515012141"] ; Science and Technology Innovation Commission of Shenzhen["JCYJ20220814170440001","K21799109","K21799116"] ; Open Project Program of Wuhan National Laboratory for Optoelectronics[2021 WNLOKF001]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:001036977700001

WILEY-V C H VERLAG GMBH

Web of Science

1.Southern Univ Sci & Technol, MOE Engn Res Ctr Integrated Circuits Next Generat, Sch Microelect, Shenzhen 518055, Peoples R China
2.Harbin Inst Technol, Sch Mechatron Engn, Harbin 150000, Peoples R China
3.Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Peoples R China

Yang, Yatao,Wang, Yifan,Yan, Yongxian,et al. On-Chip Single-Molecule Fluorescence Enhancement via Slotted Gallium Phosphide Nanodisks at Anapole States[J]. ADVANCED OPTICAL MATERIALS,2023.

Yang, Yatao,Wang, Yifan,Yan, Yongxian,Cheng, Weiren,Zhao, Qiancheng,&Li, Yi.(2023).On-Chip Single-Molecule Fluorescence Enhancement via Slotted Gallium Phosphide Nanodisks at Anapole States.ADVANCED OPTICAL MATERIALS.

Yang, Yatao,et al."On-Chip Single-Molecule Fluorescence Enhancement via Slotted Gallium Phosphide Nanodisks at Anapole States".ADVANCED OPTICAL MATERIALS (2023).