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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 33 — Nov. 20, 2008
  • pp: 6257–6265

Fluorescence polarization standard for near infrared spectroscopy and microscopy

Rafal Luchowski, Pabak Sarkar, Shashank Bharill, Gabor Laczko, Julian Borejdo, Zygmunt Gryczynski, and Ignacy Gryczynski  »View Author Affiliations


Applied Optics, Vol. 47, Issue 33, pp. 6257-6265 (2008)
http://dx.doi.org/10.1364/AO.47.006257


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Abstract

We present studies of polarized absorption [linear dichroism (LD)] and fluorescence polarization of the styryl derivative (LDS 798) embedded in oriented poly(vinyl alcohol) (PVA) films. These films were oriented by progressive stretching up to eight folds. Both vertical and horizontal components of absorptions and fluorescence were measured and dichroic ratios were determined for different film stretching ratios. The dichroic ratio and fluorescence anisotropy values were analyzed as a function of PVA film stretching ratio by fitting according to the previously developed theory. For maximum stretching ratios, exceptionally high anisotropy ( 0.8 ) and polarization ( 0.9 ) values have been measured. The stretched films have high polarization values also for isotropic excitation in a wide spectral range ( 500 700 nm ). Such films can be conveniently used as high polarization standards and we envision they will also have applications in near infrared (NIR) imaging microscopy, where they can be used for correcting an instrumental factor in polarization measurements.

© 2008 Optical Society of America

OCIS Codes
(180.2520) Microscopy : Fluorescence microscopy
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Microscopy

History
Original Manuscript: June 16, 2008
Revised Manuscript: October 9, 2008
Manuscript Accepted: October 11, 2008
Published: November 19, 2008

Virtual Issues
Vol. 4, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Rafal Luchowski, Pabak Sarkar, Shashank Bharill, Gabor Laczko, Julian Borejdo, Zygmunt Gryczynski, and Ignacy Gryczynski, "Fluorescence polarization standard for near infrared spectroscopy and microscopy," Appl. Opt. 47, 6257-6265 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-33-6257

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