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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 22 — Nov. 15, 2013
  • pp: 4597–4600

Quantitative spectroscopy on individual wire, slot, bow-tie, rectangular, and square-shaped optical antennas

Martin Husnik, Jens Niegemann, Kurt Busch, and Martin Wegener  »View Author Affiliations


Optics Letters, Vol. 38, Issue 22, pp. 4597-4600 (2013)
http://dx.doi.org/10.1364/OL.38.004597


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Abstract

By using a recently introduced approach combining a focus-modulation technique with a common-path interferometer, we measure quantitatively the extinction, scattering, and absorption cross-section spectra of individual optical antennas. The experimental results on thin-wire antennas, slot antennas, bow-tie antennas, rectangular antennas, and square-shaped antennas resonating at around 1.4 μm wavelength are discussed. We find increased resonant scattering cross sections for the latter four antennas compared to the thin-wire antenna, both in absolute terms and relative to the absorption cross section. The square-shaped antenna’s resonant extinction cross section approaches the limit of a coherent point dipole. However, the ratio of the resonant extinction cross section to the geometrical cross section of 38 is largest for the simple thin-wire antenna.

© 2013 Optical Society of America

OCIS Codes
(290.5850) Scattering : Scattering, particles
(300.1030) Spectroscopy : Absorption
(300.6380) Spectroscopy : Spectroscopy, modulation
(110.4235) Imaging systems : Nanolithography
(290.5855) Scattering : Scattering, polarization

ToC Category:
Spectroscopy

History
Original Manuscript: June 26, 2013
Revised Manuscript: September 29, 2013
Manuscript Accepted: September 30, 2013
Published: November 6, 2013

Citation
Martin Husnik, Jens Niegemann, Kurt Busch, and Martin Wegener, "Quantitative spectroscopy on individual wire, slot, bow-tie, rectangular, and square-shaped optical antennas," Opt. Lett. 38, 4597-4600 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-22-4597

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