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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 22 — Nov. 15, 2009
  • pp: 3571–3573

Near-field circular polarization probed by chiral polyfluorene

M. Savoini, P. Biagioni, G. Lakhwani, S. C. J. Meskers, L. Duò, and M. Finazzi  »View Author Affiliations


Optics Letters, Vol. 34, Issue 22, pp. 3571-3573 (2009)
http://dx.doi.org/10.1364/OL.34.003571


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Abstract

We demonstrate that a high degree of circular polarization can be delivered to the near field (NF) of an aperture at the apex of hollow-pyramid probes for scanning optical microscopy. This result is achieved by analyzing the dichroic properties of an annealed thin polymer film containing a chiral polyfluorene derivative, placed in close proximity to the optical probe. We also prove that the degree of circular polarization in the probe NF does not depend in a significant way on the shape of the aperture, at variance with the far-field behavior. These results demonstrate the feasibility of nano-optics applications exploiting circularly polarized NFs.

© 2009 Optical Society of America

OCIS Codes
(160.5470) Materials : Polymers
(260.5430) Physical optics : Polarization
(180.4243) Microscopy : Near-field microscopy
(310.5448) Thin films : Polarization, other optical properties

ToC Category:
Materials

History
Original Manuscript: July 24, 2009
Revised Manuscript: October 14, 2009
Manuscript Accepted: October 16, 2009
Published: November 12, 2009

Virtual Issues
Vol. 4, Iss. 13 Virtual Journal for Biomedical Optics

Citation
M. Savoini, P. Biagioni, G. Lakhwani, S. C. J. Meskers, L. Duò, and M. Finazzi, "Near-field circular polarization probed by chiral polyfluorene," Opt. Lett. 34, 3571-3573 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-22-3571


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References

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  16. The laser intensity impinging on the tip is approximately 5 mW. Typical measured throughput of our NF probes is 5×10−3.
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