Nano Archive

lambda/4 Resonance of an optical monopole antenna probed by single molecule fluorescence

Taminiau, Tim H. and Moerland, Robert J. and Segerink, Frans B. and Kuipers, Laurens and van Hulst, Niek F. (2007) lambda/4 Resonance of an optical monopole antenna probed by single molecule fluorescence. NANO LETTERS, 7 (1). pp. 28-33.

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We present a resonant optical nanoantenna positioned at the end of a metal-coated glass fiber near-field probe. Antenna resonances, excitation conditions, and field localization are directly probed in the near field by single fluorescent molecules and compared to finite integration technique simulations. It is shown that the antenna is equivalent to its radio frequency analogue, the monopole antenna. For the right antenna length and local excitation conditions, antenna resonances occur that lead to an enhanced localized field near the antenna apex. Direct mapping of this field with single fluorescent molecules reveals a spatial localization of 25 nm, demonstrating the importance of such antennas for nanometer resolution optical microscopy.

Item Type:Article
Subjects:Analytical Science > Microscopy and probe methods
Physical Science > Nanophysics
Physical Science > Nano objects
ID Code:6164
Deposited By:IoN
Deposited On:15 Sep 2009 09:36
Last Modified:15 Sep 2009 09:36

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