首页|Single-emitter super-resolved imaging of radiative decay rate enhancement in dielectric gap nanoantennas

Single-emitter super-resolved imaging of radiative decay rate enhancement in dielectric gap nanoantennas

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High refractive index dielectric nanoantennas strongly modify the decay rate via the Purcell effect through the design of radiative channels.Due to their dielectric nature,the field is mainly confined inside the nanostructure and in the gap,which is hard to probe with scanning probe techniques.Here we use single-molecule fluorescence lifetime imaging microscopy(smFLIM)to map the decay rate enhancement in dielectric GaP nanoantenna dimers with a median localization precision of 14 nm.We measure,in the gap of the nanoantenna,decay rates that are almost 30 times larger than on a glass substrate.By comparing experimental results with numerical simulations we show that this large enhancement is essentially radiative,contrary to the case of plasmonic nanoantennas,and therefore has great potential for applications such as quantum optics and biosensing.

R.Margoth Córdova-Castro、Bart van Dam、Alberto Lauri、Stefan A.Maier、Riccardo Sapienza、Yannick De Wilde、Ignacio Izeddin、Valentina Krachmalnicoff

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Institut Langevin,ESPCI Paris,PSL University,CNRS,Paris,France

Department of Physics,University of Ottawa,Ottawa,ON,Canada

The Blackett Laboratory,Department of Physics,Imperial College London,London,UK

School of Physics and Astronomy,Monash University,Clayton,Victoria,Australia

Chair in Hybrid Nanosystems,Ludwig-Maximilians Universität München,Muenchen,Germany

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French Agence Nationale de la Recherche via the LABEX WIFIFrench Agence Nationale de la Recherche via the LABEX WIFIANR SiMpLeLIFe projectANR MIPTIME projectUK Engineering and Physical Sciences Research Council(EPSRC)UK Engineering and Physical Sciences Research Council(EPSRC)

ANR-10-LABX-24ANR-10 IDEX-0001-02 PSLANR-17-CE09-0006ANR-22-CE09-0030-02EP/P033369/1EP/P033431/1

2024

10.1038/s41377-023-01349-2

光:科学与应用(英文版)
中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD
ISSN：2095-5545
年,卷(期)：2024.13(1)
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