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  • 42.65.Ky  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Second-order susceptibility determination by Fourier analysis (1994)
    Springer
    Applied physics 59 (1994), S. 537-541 
    Details
    ISSN: 1432-0649
    Keywords: 42.65.Ky ; 68.15. + e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The macroscopic tensor components of the nonlinear surface susceptibilityX s (2) of monomolecular organic thin films have been determined with high precision using Fourier analysis of signals obtained by polarization rotation of the incident fundamental radiation. Our analysis clearly shows the presence of three complex-valued susceptibility-tensor components and hence the inapplicability of Kleinman's conjecture for a thin film of rotational symmetry around the surface normal. The description of the susceptibility in terms of three tensor components of different phase and magnitude indicates that the usual description within the model of non-interacting rod-like molecules is insufficient to describe the optical nonlinearity of a well-organized Langmuir-Blodgett-type thin film.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01082397
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Novel glass-forming ferroelectric liquid-crystal material of high second-order nonlinearity (1994)
    Springer
    Applied physics 59 (1994), S. 591-595 
    Details
    ISSN: 1432-0649
    Keywords: 42.65.Ky ; 61.3.Eb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on a novel ferroelectric liquid-crystal material with an exceptionally large and stable nonlinear optical response. The material shows a phase transition from theSmC* mesophase to the glassy state near room temperature. This allowed us to state-freeze a stable nonlinear optically active configuration close to room temperature at 10° C for one day. The stored orientations can easily be forced to relax back by heating slightly above the glass-transition temperature. The material and the freezing process have been characterized in detail by analyzing the frequency-doubling process of the fundamental radiation of a Nd: YAG laser in the liquid crystal. Under favourable conditions, we obtained second-order susceptibilities as large as χzzz = 0.5 pm/V.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081178
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    Paper (German National Licenses)
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