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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 12 — Jun. 15, 2014
  • pp: 3587–3590

Spatial control of surface plasmon polariton excitation at planar metal surface

Zhichao Ruan, Hui Wu, Min Qiu, and Shanhui Fan  »View Author Affiliations


Optics Letters, Vol. 39, Issue 12, pp. 3587-3590 (2014)
http://dx.doi.org/10.1364/OL.39.003587


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Abstract

We illustrate that the surface plasmon polariton (SPP) excitation through the prism coupling method is fundamentally limited by destructive interference of spatial light components. We propose that the destructive interference can be canceled out by tailoring the relative phase for the different wave-vector components. As a numerical demonstration, we show that through the phase modulation the excited SPP field is concentrated to a hot energy spot, and the SPP field intensity is dramatically enhanced about three-fold in comparison with a conventional Gaussian beam illumination. The proposed phase-shaped beam approach provides a new degree of freedom to fundamentally control the SPP excitation and benefits the development of surface-enhanced applications.

© 2014 Optical Society of America

OCIS Codes
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(230.6120) Optical devices : Spatial light modulators
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Fourier Optics and Signal Processing

History
Original Manuscript: April 1, 2014
Revised Manuscript: May 11, 2014
Manuscript Accepted: May 14, 2014
Published: June 11, 2014

Citation
Zhichao Ruan, Hui Wu, Min Qiu, and Shanhui Fan, "Spatial control of surface plasmon polariton excitation at planar metal surface," Opt. Lett. 39, 3587-3590 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-12-3587

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