Design of plasmonic nano-antenna for total internal reflection fluorescence microscopy

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We propose a gold modified bow-tie plasmonic nano-antenna, which can be suitably used in combination with total internal reflection fluorescence microscopy. The plasmonic nano-antenna, supporting well-separated multiple resonances, not only concentrates the total internal reflection evanescent field at the deep subwavelength scale, but also enhances fluorescence emission by the Purcell effect. Finite-difference time-domain computations show that the enhancement of the excitation light strongly correlates with the far-field radiation pattern radiated from the antenna. Depending on the antenna geometry, the resonant modes are widely tuned and their wavelengths can be easily matched to the diverse emission or excitation wavelengths of fluorophores.
Publisher
OPTICAL SOC AMER
Issue Date
2013-10
Language
English
Article Type
Article
Keywords

OPTICAL ANTENNAS; EMISSION; TIRF; NANOANTENNA; ADSORPTION; LIGHT; CELL

Citation

OPTICS EXPRESS, v.21, no.20, pp.23036 - 23047

ISSN
1094-4087
DOI
10.1364/OE.21.023036
URI
http://hdl.handle.net/10203/188529
Appears in Collection
PH-Journal Papers(저널논문)
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