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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 10 — May. 10, 2010
  • pp: 10871–10877

Demonstration of an elliptical plasmonic lens illuminated with radially–like polarized field

Gilad M. Lerman, Avner Yanai, Nissim Ben-Yosef, and Uriel Levy  »View Author Affiliations


Optics Express, Vol. 18, Issue 10, pp. 10871-10877 (2010)
http://dx.doi.org/10.1364/OE.18.010871


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Abstract

We demonstrate an elliptically symmetric plasmonic lens that is illuminated by a radially-like polarization field. This illumination function is TM polarized with regard to the plasmonic lens, ensuring optimum coupling of the incident light into surface plasmons polaritons. The structure is analyzed theoretically by using the Green function approach, and a finite difference time domain simulation. Both approaches provide similar results. Specifically we calculate and experimentally measure the field distribution on the surface and a few microns above it. The results show strong dependency of the electric field distribution on the eccentricity of the elliptic structure and the illumination wavelength. The interference of surface plasmons generates a structured pattern consisting of distinct peaks distributed inside the ellipse with locations that are wavelength dependent. This pattern can be used in several applications including structured illumination microscopy, particles beam trapping and sensing.

© 2010 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.5430) Physical optics : Polarization

History
Original Manuscript: February 16, 2010
Revised Manuscript: March 31, 2010
Manuscript Accepted: April 13, 2010
Published: May 10, 2010

Virtual Issues
Vol. 5, Iss. 9 Virtual Journal for Biomedical Optics
Unconventional Polarization States of Light (2010) Optics Express

Citation
Gilad M. Lerman, Avner Yanai, Nissim Ben-Yosef, and Uriel Levy, "Demonstration of an elliptical plasmonic lens illuminated with radially–like polarized field," Opt. Express 18, 10871-10877 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-10-10871


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