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  • 1
    Electronic Resource
    Electronic Resource
    Quantum-well strain and thickness characterization by degree of polarization (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 7640-7645 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: InGaAsP/InP single quantum wells grown by gas-source molecular-beam epitaxy have been characterized for their strain and thickness using degree of polarization (DOP) of the edge emission photoluminescence at room temperature. The DOP is a measure of the relative strengths of TE- and TM-polarized e–hh and e–lh transitions. The value of the DOP increases with a decrease in thickness of the well and as the strain varies from tension to compression. For example, we observe a variation of DOP from 20% to 79% when the strain varies from 1% tension to 1% compression for a 30 A(ring) layer and from 27% to 62% when the thickness of a lattice-matched well is varied from 100 to 30 A(ring). A simple theoretical model is used to predict this trend. We show that this technique provides a sensitive measure of the variations in the strain and thickness of quantum wells. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362427
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  • 2
    Electronic Resource
    Electronic Resource
    Anisotropic interfacial strain in InP/InGaAs/InP quantum wells studied using degree of polarization of photoluminescence (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 3616-3620 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Room-temperature, polarization-resolved photoluminescence from a (001) surface has been used to investigate InP/InGaAs/InP quantum wells grown by gas source molecular beam epitaxy. The degree of polarization of photoluminescence from a (001) surface, DOP001, is a direct measure of the anisotropy of polarization of luminescence between [110] and [11¯ 0] directions. DOP001 is observed to be strongly dependent on the quantum well thickness, composition (strain), and the gas switching time at the growth-interrupted interface. Results show that the anisotropy of polarization may be due to an effect of an anisotropic strain field that is associated with strained bonds at the interfaces of the quantum well. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365479
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  • 3
    Electronic Resource
    Electronic Resource
    Anisotropic interfacial strain in InP/InGaAs/InP quantum wells (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 5739-5742 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Numerical simulations based on a valence force field model have been performed to explain experimental results on the degree of polarization of photoluminescence from the [001] direction of InP/InGaAs/InP quantum wells grown on (001) substrates by gas-source molecular beam epitaxy. The results of the simulations indicate an anisotropic strain field owing to fundamental, growth-related differences between the interfaces of the quantum well. The anisotropic strain field is associated with strained Ga–P, Ga–As, and In–As bonds at the InP/InGaAs/InP interfaces. The results of the simulations are in agreement with measurements of the degree of polarization of photoluminescence from the [001] direction of the quantum wells. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368839
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  • 4
    Electronic Resource
    Electronic Resource
    M 2 Component at Hyderabad (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 774-775 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Month Jan. Feb. Apr. May June A 0-0815 0-0807 0-0830 0-0839 0-0812 Table 1 G 1-18 1-17 1-20 1-21 1-18 h 0-64 0-61 0-71 0-75 0-64 k 0-31 0-29 0-34 0-36 0-31 I 0-08 0-08 0-09 0-10 0-08 In Table 1 the gravimetric factor O is the ratio of the observed amplitude (A] in milligals to the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/204774b0
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  • 5
    Electronic Resource
    Electronic Resource
    Tidal Constants at Hyderabad (1963)
    [s.l.] : Nature Publishing Group
    Nature 198 (1963), S. 1079-1079 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The theoretical values (mgal) for the 7 components have been obtained from the tide-predicting apparatus located at Dehra Dun. The ratio of the theoretical and the experimentally determined values of the amplitudes of the curve has been calculated and this will enable us to calculate the other ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1981079a0
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  • 6
    Electronic Resource
    Electronic Resource
    Separation of xipho-omphalopagus twins (1988)
    Springer
    Pediatric surgery international 3 (1988), S. 76-78 
    Details
    ISSN: 1437-9813
    Keywords: Conjoined twins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A report of the successful separation of the first pair of xipho-omphalopagus twins in the United Arab Emirates is presented. Clinical examination and investigations revealed that they were joined from the lower part of the sternum to the umbilicus with fused lower costal cartilages. They shared a common liver with separate biliary systems. At the age of 50 days, surgery was carried out on a single table without a frame. Intravenous fluorescein was used to determine the line of fusion and was of particular help in separating the large liver juncture. A silastic sheath was used to close the upper abdominal and lower thoracic incisions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00177088
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