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  • Electronic Resource  (3)
  • 1985-1989  (3)
  • 1986  (3)
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  • Electronic Resource  (3)
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  • 1985-1989  (3)
Year
  • 1
    Electronic Resource
    Electronic Resource
    GaAs/AlGaAs distributed feedback structure with multiquantum well for surface-emitting laser (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 874-877 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We demonstrate laser emission by photopumping at room temperature from a distributed feedback structure for a surface-emitting laser constructed by alternating growths of a GaAs/AlGaAs multiquantum well and an Al0.7Ga0.3As layer using molecular-beam epitaxy. A threshold photoexcitation intensity lower than 3.1×105 W/cm2, a 34-nm longitudinal mode spacing, and a 2.3-nm peak width of the laser emission were observed for the 6-μm-thick multilayer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337328
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ionized Mg doping in molecular-beam epitaxy of GaAs (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 1092-1095 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using ionized Mg beams accelerated to energies from 130 to 500 eV, Mg doping was studied in molecular-beam epitaxy of GaAs. The incorporation coefficient of Mg increases by a factor of about 100 when compared with the use of neutral Mg beams. Hole concentrations as high as about 1×1019 cm−3 have been achieved. Photoluminescence measurements suggest that the damage due to Mg-ion bombardment is negligible when the ion accelerating voltage (Va) (approximately-less-than)130 V. For higher Va , the damage can be removed by postgrowth annealing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336545
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Bronchial responsiveness to methacholine during airway cooling in normal subjects (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 16 (1986), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In order to investigate the effects of airway cooling on bronchial responsiveness in normal subjects, we measured bronchial responsiveness to inhaled methacholine with and without the inhalation of cold air. Two out of seven subjects showed an increase in baseline respiratory resistance (Rrs) during cooling of the airway but the other five subjects showed little change in their baseline Rrs. All subjects increased bronchial responsiveness to methacholine. Additionally, the threshold dose of methacholine decreased to one-third of the control dose with cooling of the airway. We speculate that airway cooling increased bronchial responsiveness to methacholine in normal subjects presumably due to increased vagal tone, increased alpha-adrenergic activity and/or a release of chemical mediators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.1986.tb01951.x
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    Paper (German National Licenses)
    Fulltext
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