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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 10 — Nov. 8, 2013

Molecule fluorescence modified by a slit-based nanoantenna with dual gratings

Hongming Shen, Guowei Lu, Tianyue Zhang, Jie Liu, Yingbo He, Yuwei Wang, and Qihuang Gong  »View Author Affiliations


JOSA B, Vol. 30, Issue 9, pp. 2420-2426 (2013)
http://dx.doi.org/10.1364/JOSAB.30.002420


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Abstract

In this study, molecule fluorescence modified by slit-based nanoantennas surrounded with metal gratings was investigated by employing the finite-difference time-domain method. We quantified the relative contribution of excitation and emission gains to the total fluorescence enhancement. The simulation results show that the asymmetric dual-grating (DG) antenna provides an efficient way to control the local excitation enhancement, the collection efficiency, and the quantum efficiency separately for bright emission and beaming light. We also investigated the dependence of fluorescence enhancement on the geometric parameters of the antenna, such as the nano-slit width and number of grooves. The asymmetric DG structure greatly improves the flexibility of the nanostructure design to further optimize the plasmonic enhancement effect and provides a promising route to manipulate single-molecule fluorescence emission.

© 2013 Optical Society of America

OCIS Codes
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(050.0050) Diffraction and gratings : Diffraction and gratings
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Diffraction and Gratings

History
Original Manuscript: March 5, 2013
Revised Manuscript: July 14, 2013
Manuscript Accepted: July 25, 2013
Published: August 20, 2013

Virtual Issues
Vol. 8, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Hongming Shen, Guowei Lu, Tianyue Zhang, Jie Liu, Yingbo He, Yuwei Wang, and Qihuang Gong, "Molecule fluorescence modified by a slit-based nanoantenna with dual gratings," J. Opt. Soc. Am. B 30, 2420-2426 (2013)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josab-30-9-2420

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