Near-field circular polarization probed by chiral polyfluorene
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/vjbo/abstract.cfm?URI=ol-34-22-3571
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