Polarization Nonlinear Optics of Quadratically Nonlinear Azopolymers
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 non...
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| Veröffentlicht in: | Optics and spectroscopy 2005-07, Vol.99 (1), p.131 |
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| container_title | Optics and spectroscopy |
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| creator | Konorov, S. O. |
| description | 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 {pi}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 {pi} electrons along an extended group of atoms in such molecules. |
| doi_str_mv | 10.1134/1.1999905 |
| format | Article |
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O.</creatorcontrib><title>Polarization Nonlinear Optics of Quadratically Nonlinear Azopolymers</title><title>Optics and spectroscopy</title><description>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 {pi}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. 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| ispartof | Optics and spectroscopy, 2005-07, Vol.99 (1), p.131 |
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| language | eng |
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| subjects | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DIPOLES ELECTRIC FIELDS ELECTRO-OPTICAL EFFECTS ELECTRONS HARMONIC GENERATION LASERS MOLECULES NONLINEAR OPTICS POLARIZATION POLYMERS PULSES SIGNALS TENSORS VISIBLE RADIATION |
| title | Polarization Nonlinear Optics of Quadratically Nonlinear Azopolymers |
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