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Spontaneous emission modified by an aperture-based nanoantenna with dual gratings
SHEN Hongming 1,LU Guowei 2 *,ZHANG Tianyue 3,LIU Jie 3,HE Yingbo 3,WANG Yuwei 2,GONG Qihuang 3
1.State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871
2.State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China
3.State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China
*Correspondence author
#Submitted by
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Funding: This work was supported by the National Key Basic Research Program of China (No.grant nos. 2013CB328703 and 2009CB930504), the National Natural Science Foundation of China(No.grant nos. 61008026, 11121091, 90921008), Specialized Research Fund for the Doctoral Program of Higher Education of China(No.Grant No.20100001120007)
Opened online:15 July 2013
Accepted by: none
Citation: SHEN Hongming,LU Guowei,ZHANG Tianyue.Spontaneous emission modified by an aperture-based nanoantenna with dual gratings[OL]. [15 July 2013] http://en.paper.edu.cn/en_releasepaper/content/4550186
 
 
In this letter, aperture-based nanoantennas surrounded by asymmetric metal gratings were theoretically investigated to modify the fluorescence characteristics. Taken local excitation enhancement, quantum efficiency and collection efficiency into account together, we quantify the relative contributions of excitation and emission gains to the total fluorescence enhancements. The dual-gratings structure provides an efficient way to control the excitation and emission processes separately for enhancing emission and beaming light. The scheme greatly improves the flexibility of nanostructure design and makes a promising route to manipulate the single-molecule spontaneous emission.
Keywords:photonics; plasmonic nanoantenna; single-molecule fluorescence modulation; metal gratings
 
 
 

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