title: Coherent fluorescence emission by using hybrid photonic-plasmonic crystals.
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 μm2, 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.
authors: 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.
authors: Lei
authors: L
authors: Shi
authors: 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.
authors: Xiaowen
authors: X
authors: Yuan
authors: Department of Physics, Key Laboratory of Micro & Nano Photonic Structures (MOE) and Key Laboratory of Surface Physics, Fudan University Shanghai 200433, P. R. China.
authors: Yafeng
authors: Y
authors: Zhang
authors: COMP Centre of Excellence, Department of Applied Physics, Aalto University FI-00076 Aalto, Finland.
authors: Tommi
authors: T
authors: Hakala
authors: COMP Centre of Excellence, Department of Applied Physics, Aalto University FI-00076 Aalto, Finland.
authors: Shaoyu
authors: S
authors: Yin
authors: Department of Physics, Key Laboratory of Micro & Nano Photonic Structures (MOE) and Key Laboratory of Surface Physics, Fudan University Shanghai 200433, P. R. China.
authors: Dezhuan
authors: D
authors: Han
authors: Department of Physics, Key Laboratory of Micro & Nano Photonic Structures (MOE) and Key Laboratory of Surface Physics, Fudan University Shanghai 200433, P. R. China.
authors: Xiaolong
authors: X
authors: Zhu
authors: National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences 200083 Shanghai, China.
authors: Bo
authors: B
authors: Zhang
authors: Department of Physics, Key Laboratory of Micro & Nano Photonic Structures (MOE) and Key Laboratory of Surface Physics, Fudan University Shanghai 200433, P. R. China.
authors: Xiaohan
authors: X
authors: Liu
authors: COMP Centre of Excellence, Department of Applied Physics, Aalto University FI-00076 Aalto, Finland.
authors: Päivi
authors: P
authors: Törmä
authors: National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences 200083 Shanghai, China.
authors: Wei
authors: W
authors: Lu
authors: Department of Physics, Key Laboratory of Micro & Nano Photonic Structures (MOE) and Key Laboratory of Surface Physics, Fudan University Shanghai 200433, P. R. China.
authors: Jian
authors: J
authors: Zi
keywords: coherence; fluorescence; hybrid photonic–plasmonic crystals; quasi-two-dimensional optical modes