Author Affiliations
Abstract
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
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.
quantum emitter single-molecule spectroscopy quantum efficiency single-photon source Chinese Optics Letters
2022, 20(7): 073602
北京大学物理学院人工微结构与介观物理国家重点实验室, 北京 100871
通过对激光脉冲频谱的相位、振幅或偏振进行调制,可以获得不同时域分布的激光脉冲。这些特性不同的激光脉冲在物理过程和光学器件研究中具有重要的应用。随着光发射电子显微镜、超灵敏探测光谱仪、扫描近场显微等技术的发展,激光脉冲整形技术在微纳米光学中的应用日益深入。总结了近年来激光脉冲整形与测量技术的发展,综述了激光脉冲整形在近场光学、光发射电子显微镜、单分子光谱中的应用研究进展。
物理光学 脉冲整形 超快光谱 光发射电子显微镜 单分子光谱 光学学报
2016, 36(10): 1026007