利用混合光子 - 等离子体晶体实现的相干荧光发射。

Coherent fluorescence emission by using hybrid photonic-plasmonic crystals.

作者信息

Shi Lei, Yuan Xiaowen, Zhang Yafeng, Hakala Tommi, Yin Shaoyu, Han Dezhuan, Zhu Xiaolong, Zhang Bo, Liu Xiaohan, Törmä Päivi, Lu Wei, Zi Jian

机构信息

Department of Physics, Key Laboratory of Micro & Nano Photonic Structures (MOE) and Key Laboratory of Surface Physics, Fudan University Shanghai 200433, P. R. China ; COMP Centre of Excellence, Department of Applied Physics, Aalto University FI-00076 Aalto, Finland.

National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences 200083 Shanghai, China ; Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology 430074 Wuhan, China.

出版信息

Laser Photon Rev. 2014 Sep;8(5):717-725. doi: 10.1002/lpor.201300196. Epub 2014 Jun 17.

DOI:10.1002/lpor.201300196

PMID:25793015

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4358154/

Abstract

The spatial and temporal coherence of the fluorescence emission controlled by a quasi-two-dimensional hybrid photonic-plasmonic crystal structure covered with a thin fluorescent-molecular-doped dielectric film is investigated experimentally. A simple theoretical model to describe how a confined quasi-two-dimensional optical mode may induce coherent fluorescence emission is also presented. Concerning the spatial coherence, it is experimentally observed that the coherence area in the plane of the light source is in excess of 49 μm, which results in enhanced directional fluorescence emission. Concerning temporal coherence, the obtained coherence time is 4 times longer than that of the normal fluorescence emission in vacuum. Moreover, a Young's double-slit interference experiment is performed to directly confirm the spatially coherent emission. This smoking gun proof of spatial coherence is reported here for the first time for the optical-mode-modified emission.

摘要

对覆盖有薄荧光分子掺杂介电膜的准二维混合光子 - 等离子体晶体结构所控制的荧光发射的空间和时间相干性进行了实验研究。还提出了一个简单的理论模型来描述受限的准二维光学模式如何诱导相干荧光发射。关于空间相干性，实验观察到光源平面内的相干面积超过49μm，这导致了增强的定向荧光发射。关于时间相干性，获得的相干时间比真空中正常荧光发射的相干时间长4倍。此外，进行了杨氏双缝干涉实验以直接确认空间相干发射。这里首次报道了这种光学模式改性发射的空间相干性的确凿证据。