Coupling Single Photons from Discrete Quantum Emitters in WSe2 to Lithographically Defined Plasmonic Slot Waveguides
Coupling Single Photons from Discrete Quantum Emitters in WSe2 to Lithographically Defined Plasmonic Slot Waveguides
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DOI：
10.1021/acs.nanolett.8b02687
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发表时间：
2018-11-01
期刊：
影响因子：
10.8
通讯作者：
Kaniber, M.
中科院分区：
文献类型：
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作者：
Blauth, M.;Juergensen, M.;Kaniber, M.
我们报告的观察产生和路由的单等离子体激元产生的局部激子在WSe 2单层片状剥离到光刻定义的金等离子体波导。对不同量子发射器的位置的统计分析表明，它们形成靠近等离子体激元波导边缘的可能性高出（3.3 +/-0.7）倍。通过表征单个发射器，我们通过观察信号中的反聚束（g（（2））（0）= 0.42）来确认它们的单光子特性，并证明特定的发射器耦合到近端等离子体波导的模式。对靠近和远离等离子体纳米结构的发射体进行的时间分辨测量表明，根据量子发射体相对于紧密限制的等离子体模式的精确位置，出现高达15 +/- 3的珀塞尔因子。五个量子发射体相对于波导的点扩散函数的测量
We report the observation of the generation and routing of single plasmons generated by localized excitons in a WSe2 monolayer flake exfoliated onto lithographically defined Au-plasmonic waveguides. Statistical analysis of the position of different quantum emitters shows that they are (3.3 +/- 0.7) times more likely to form close to the edges of the plasmonic waveguides. By characterizing individual emitters, we confirm their single-photon character via the observation of antibunching in the signal (g((2))(0) = 0.42) and demonstrate that specific emitters couple to modes of the proximal plasmonic waveguide. Time-resolved measurements performed on emitters close to and far away from the plasmonic nanostructures indicate that Purcell factors up to 15 +/- 3 occur, depending on the precise location of the quantum emitter relative to the tightly confined plasmonic mode. Measurement of the point spread function of five quantum emitters relative to the waveguide with