Single-emitter super-resolved imaging of radiative decay rate enhancement in dielectric gap nanoantennas
作者机构：Institut LangevinESPCI ParisPSL UniversityCNRSParisFrance The Blackett LaboratoryDepartment of PhysicsImperial College LondonLondonUK School of Physics and AstronomyMonash UniversityClaytonVictoriaAustralia Chair in Hybrid NanosystemsLudwig-Maximilians Universität MünchenMuenchenGermany Department of PhysicsUniversity of OttawaOttawaONCanada
出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)
年 卷 期：2024年第13卷第1期
页 面：47-54页
核心收录：
学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：received financial support from the French Agence Nationale de la Recherche via the LABEX WIFI under ANR-10-LABX-24 and ANR-10 IDEX-0001-02 PSL the ANR SiMpLeLIFe project ANR-17-CE09-0006 the ANR MIPTIME project ANR-22-CE09-0030-02 It has also received financial support from the UK Engineering and Physical Sciences Research Council(EPSRC)via the following grants:EP/P033369/1 and EP/P033431/1.S.A.M.also acknowledges the Lee-Lucas Chair in Physics
主 题：dielectric decay radiative
摘 要：High refractive index dielectric nanoantennas strongly modify the decay rate via the Purcell effect through the design of radiative *** to their dielectric nature,the field is mainly confined inside the nanostructure and in the gap,which is hard to probe with scanning probe *** 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 *** measure,in the gap of the nanoantenna,decay rates that are almost 30 times larger than on a glass *** 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.
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