Probing fluorescence quantum efficiency of single molecules in an organic matrix by monitoring lifetime change during sublimation  

作　　者：Penglong Ren Shangming Wei Pu Zhang Xue-Wen Chen 任鹏龙;韦尚明;张朴;陈学文(School of Physics and Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China;Institute for Quantum Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]School of Physics and Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China [2]Institute for Quantum Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Chinese Optics Letters》2022年第7期52-56,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.11874166)。

摘　　要：Quantum efficiency is a critical piece of information of a quantum emitter and regulates the emitter’s fluorescence decay dynamics in an optical environment through the Purcell effect.Here,we present a simple way to experimentally probe fluorescence quantum efficiency of single dibenzoterrylene molecules embedded in a thin anthracene microcrystal obtained through a co-sublimation process.In particular,we correlate the fluorescence lifetime change of single dibenzoterrylene molecules with the variation of the matrix thickness due to natural sublimation.With the identification of the molecule emission dipole orientation,we could deduce the near-unity intrinsic quantum efficiency of dibenzoterrylene molecules in the anthracene matrix.

关 键 词：quantum emitter single-molecule spectroscopy quantum efficiency single-photon source 

分 类 号：O413[理学—理论物理] O625.154[理学—物理]