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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 31 — Nov. 1, 2011
  • pp: G1–G6

Direct observation of plasmonic index ellipsoids on a deep-subwavelength metallic grating

Liang Feng, Zhaowei Liu, and Yeshaiahu Fainman  »View Author Affiliations


Applied Optics, Vol. 50, Issue 31, pp. G1-G6 (2011)
http://dx.doi.org/10.1364/AO.50.0000G1


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Abstract

We constructed a metallic grating on a deep-subwavelength scale and tested its plasmonic features in visible frequencies. The deep-subwavelength metallic grating effectively acts as an anisotropic homogeneous uniaxial form-birefringent metal, exhibiting different optical responses for polarizations along different optical axes. Therefore, this form-birefringent metal supports anisotropic surface plasmon polaritons that are characterized by directly imaging the generated plasmonic index ellipsoids in reciprocal space. The observed plasmonic index ellipsoids also show a rainbow effect, where different colors are dispersively distributed in reciprocal space.

© 2011 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(050.2555) Diffraction and gratings : Form birefringence
(310.6628) Thin films : Subwavelength structures, nanostructures

History
Original Manuscript: June 29, 2011
Manuscript Accepted: July 21, 2011
Published: September 9, 2011

Citation
Liang Feng, Zhaowei Liu, and Yeshaiahu Fainman, "Direct observation of plasmonic index ellipsoids on a deep-subwavelength metallic grating," Appl. Opt. 50, G1-G6 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-31-G1

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