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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 19 — Oct. 1, 2012
  • pp: 4017–4019

Optical fiber tip for field-enhanced second harmonic generation

Sudipta Sarkar Pal, Samir K. Mondal, Phun Phun Bajpai, and Pawan Kapur  »View Author Affiliations

Optics Letters, Vol. 37, Issue 19, pp. 4017-4019 (2012)

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We propose a simple optical fiber tip for field-enhanced second harmonic generation (SHG). The tip shows nonlinear phenomena of SHG over a wide range of sources, at least from 630 to 830 nm. The optical field corresponding to the second harmonic appears as a nondiffracting bottle beam with voids due to the surface curvature of the tip. The field-enhanced second harmonic can also induce surface plasmons, converting the tip to a plasmonic probe with reduced background signal. The tip can be useful in nanophotonics characterization. As an example, we demonstrate the tip’s response as a surface-enhanced Raman spectroscopy probe.

© 2012 Optical Society of America

OCIS Codes
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(250.5403) Optoelectronics : Plasmonics
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optical Design and Fabrication

Original Manuscript: August 17, 2012
Revised Manuscript: August 24, 2012
Manuscript Accepted: August 24, 2012
Published: September 20, 2012

Sudipta Sarkar Pal, Samir K. Mondal, Phun Phun Bajpai, and Pawan Kapur, "Optical fiber tip for field-enhanced second harmonic generation," Opt. Lett. 37, 4017-4019 (2012)

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