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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: 4861–4863

Photonic–plasmonic-coupled nanoantennas for polarization-controlled multispectral nanofocusing

J. Trevino, G. F. Walsh, E. F. Pecora, S. V. Boriskina, and L. Dal Negro  »View Author Affiliations


Optics Letters, Vol. 38, Issue 22, pp. 4861-4863 (2013)
http://dx.doi.org/10.1364/OL.38.004861


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Abstract

We report on the design and experimental demonstration of array-enhanced nanoantennas for polarization-controlled multispectral nanofocusing in the near-IR spectral range. We design plasmonic double bow-tie nanoantennas-coupled to multiple-periodic nanoparticle arrays to harvest radiation of designed wavelengths from a large spatial area and to focus it into a targeted nanoscale region. Near-field calculations were performed on a gold nanoantenna array using three-dimensional finite difference time domain simulations. Cross-shaped optical nanoantennas were fabricated on glass substrates using electron beam lithography. The optical characterization of the fabricated nanoantennas was performed using second harmonic excitation spectroscopy that demonstrates multiwavelength photonic coupling in good agreement with the antenna modeling. The nanoantenna structures introduced in this Letter provide the ability to focus optical energy into deep subwavelength areas and to address multiple spectral regions with polarization control. Such attributes are highly desirable in optical biosensing, enhanced Raman scattering, and for nonlinear plasmonic applications.

© 2013 Optical Society of America

OCIS Codes
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(250.5403) Optoelectronics : Plasmonics
(240.5440) Optics at surfaces : Polarization-selective devices

ToC Category:
Optics at Surfaces

History
Original Manuscript: August 16, 2013
Manuscript Accepted: September 13, 2013
Published: November 14, 2013

Virtual Issues
Vol. 9, Iss. 1 Virtual Journal for Biomedical Optics

Citation
J. Trevino, G. F. Walsh, E. F. Pecora, S. V. Boriskina, and L. Dal Negro, "Photonic–plasmonic-coupled nanoantennas for polarization-controlled multispectral nanofocusing," Opt. Lett. 38, 4861-4863 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-22-4861

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