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Optics and Spectroscopy

, Volume 99, Issue 1, pp 131–136 | Cite as

Polarization nonlinear optics of quadratically nonlinear azopolymers

  • S. O. Konorov
  • A. A. Ivanov
  • D. A. Akimov
  • A. V. Yakimanskii
  • A. A. Podshivalov
  • A. N. Petrov
  • N. N. Smirnov
  • V. N. Ivanova
  • V. V. Kudryavtsev
  • I. M. Sokolova
  • M. V. Alfimov
  • A. M. Zheltikov
Lasers and Their Applications
  • 39 Downloads

Abstract

The polarization properties of second harmonic and sum-frequency signals generated by femtosecond laser pulses in films of polymers containing covalent groups of an azobenzothiazole chromophore polarized by an external electric field are investigated. It is shown that the methods of polarization nonlinear optics make it possible to determine the structure of oriented molecular dipoles and reveal important properties of the motion of collectivized π electrons in organic molecules with strong optical nonlinearities. The polarization measurements show that the tensor of quadratic nonlinear optical susceptibility of chromophore fragments oriented by an external field in macromolecules of the noted azopolymers has a degenerate form. This is indicative of a predominantly one-dimensional character of motion of collectivized π electrons along an extended group of atoms in such molecules.

Keywords

Laser Pulse Macromolecule External Field Femtosecond Laser Nonlinear Optic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Inc. 2005

Authors and Affiliations

  • S. O. Konorov
    • 1
  • A. A. Ivanov
    • 2
  • D. A. Akimov
    • 1
  • A. V. Yakimanskii
    • 3
  • A. A. Podshivalov
    • 4
  • A. N. Petrov
    • 2
  • N. N. Smirnov
    • 3
  • V. N. Ivanova
    • 3
  • V. V. Kudryavtsev
    • 3
  • I. M. Sokolova
    • 5
  • M. V. Alfimov
    • 2
  • A. M. Zheltikov
    • 1
    • 4
  1. 1.Moscow State UniversityMoscowRussia
  2. 2.Center of PhotochemistryRussian Academy of SciencesMoscowRussia
  3. 3.Institute of Macromolecular CompoundsRussian Academy of SciencesSt. PetersburgRussia
  4. 4.International Laser CenterMoscow State UniversityMoscowRussia
  5. 5.St. Petersburg Electrotechnical UniversitySt. PetersburgRussia

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