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  • 1
    Electronic Resource
    Electronic Resource
    Opto-optical modulation in nematic liquid crystals (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 899-902 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new type of opto-optical modulation effect in nematic liquid crystals is experimentally observed. The transmitted intensity of a He-Ne laser beam passing through a liquid crystal sample while applying a dc voltage is modulated by illuminating the sample with a xenon flash lamp pulse. The response time is fast, of the order of several milliseconds. The modulated state lasts for about 500 ms. A modulated intensity of light as large as ten times the unmodulated one is obtained. The physical origin of this effect is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346756
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A correlation between the enthalpy of mixing and the internal strain energy in the III-V alloy semiconductor system (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 4142-4145 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The enthalpy of mixing calculated using the delta lattice parameter model has been compared with the internal strain energy estimated by the elastic sphere approximation. The composition dependencies of both energies are very similar for the quaternary III-V alloy semiconductors. Substantial origin of increase of the enthalpy in the alloy is concluded to be the internal strain caused by the difference in the bond length of constituent compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339131
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  • 3
    Electronic Resource
    Electronic Resource
    Internal strain energy in quaternary III-V compound alloys (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 739-742 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Internal strain energies for quaternary III-V compound alloys of the type AxB1−xCyD1−y have been estimated. The strain is attributable to the difference in bond length among the constituent compounds. Results are shown in the form of contour of the energy. The energies in AlGaAsP are relatively small; the maximum value is about 4 kJ/mol, and those in AlInPSb are large; the maximum is about 50 kJ/mol. The alloys are concluded to be hardly miscible by ordinary growth methods in the domain of strain energies larger than 19 kJ/mol. The qualities of the alloys can be predicted by the internal strain-energy charts presented in this study. The effect of movement of atoms from the virtual crystal-lattice sites is discussed. Comparison to the enthalpy of mixing is also made.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336593
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    Paper (German National Licenses)
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