Fluorescence Enhancement with the Optical (Bi-) Conical Antenna

Year: 2010

Authors: Mohammadi A., Kaminski F., Sandoghdar V., Agio M.

Autors Affiliation: ETH, Phys Chem Lab, CH-8093 Zurich, Switzerland; Persian Gulf Univ, Dept Phys, Bushehr 75196, Iran.

Abstract: We investigate the properties of finite gold nanocones as optical antennas for enhancing molecular fluorescence. We compute the modification of the excitation rate, spontaneous emission rate, and quantum efficiency as a function of the nanocone base and length, showing that the maximum field and fluorescence enhancements do not occur for the same nanocone parameters. We compare the results with those for nanorods and nanospheroids and find that nanocones perform better.

Journal/Review: JOURNAL OF PHYSICAL CHEMISTRY C

Volume: 114 (16)      Pages from: 7372  to: 7377

More Information: The authors would like to thank X.-W. Chen, E. Di Fabrizio, F. De Angelis, H. M. Eghlidi, K.-G. Lee, and S. Gotzinger for fruitful discussions. A. Mohammadi acknowledges support from the Persian Gulf University Research Council. This work was performed in the framework of the ETH Zurich initiative on Composite Doped Metamaterials (CDM).
KeyWords: Single-molecule Fluorescence; Near-field; Spontaneous Emission; Raman-scattering; Silver; Design; Decay; Time; Nanoantennas; Microscopy
DOI: 10.1021/jp9094084

Citations: 55
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