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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 2 — Jan. 22, 2007
  • pp: 652–659

The anisotropic nanomovement of azo-polymers

H. Ishitobi, M. Tanabe, Z. Sekkat, and S. Kawata  »View Author Affiliations


Optics Express, Vol. 15, Issue 2, pp. 652-659 (2007)
http://dx.doi.org/10.1364/OE.15.000652


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Abstract

Nanoscale polymer movement is induced by a tightly focused laser beam in an azo-polymer film just at the diffraction limit of light. The deformation pattern that is produced by photoisomerization of the azo dye is strongly dependent on the incident laser polarization and the longitudinal focus position of the laser beam along the optical axis. The anisotropic photo-fluidity of the polymer film and the optical gradient force played important roles in the light induced polymer movement. We also explored the limits of the size of the photo-induced deformation, and we found that the deformation depends on the laser intensity and the exposure time. The smallest deformation size achieved was 200 nm in full width of half maximum; a value which is nearly equal to the size of the diffraction limited laser spot.

© 2007 Optical Society of America

OCIS Codes
(160.5470) Materials : Polymers
(210.4810) Optical data storage : Optical storage-recording materials
(240.6670) Optics at surfaces : Surface photochemistry

ToC Category:
Optics at Surfaces

History
Original Manuscript: October 18, 2006
Revised Manuscript: December 5, 2006
Manuscript Accepted: December 11, 2006
Published: January 22, 2007

Citation
H. Ishitobi, M. Tanabe, Z. Sekkat, and S. Kawata, "The anisotropic nanomovement of azo-polymers," Opt. Express 15, 652-659 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-2-652


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