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  • 2000-2004  (4)
  • 1930-1934  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Wetting layer carrier dynamics in InAs/InP quantum dots (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 3052-3054 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electronic coupling between InAs/InP quantum dot (QD) array and its wetting layer (WL) is studied by continuous wave and time resolved photoluminescence. The carrier dynamics is explained by the existence of two regimes in the WL: at low QD density the carrier dynamics is dominated by the diffusion and at high density when the distance between QDs is comparable to the carrier mean free path in the WL the quantum capture into QDs dominates. From the identification of these two regimes the carrier mean free path in the WL is estimated to about 30 nm. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1338953
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Direct measurement of the attenuation of capillary waves by laser interferometry: Noncontact determination of viscosity (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 2399-2401 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The determination of viscosity from the damping of capillary waves has been of great interest, as it affords the possibility of measuring viscosity without contact with the fluid. Here we describe a noncontact method for precision measurement of the amplitude of capillary waves on fluids. The technique utilizes a miniature laser interferometer to map the wave profile with a resolution of about 10 nm. We use this technique to obtain the dispersion and attenuation of capillary waves on water as a test case. Furthermore, the attenuation data is used to obtain the viscosity of water as a function of temperature. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1365413
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    High-speed 1.55 μm Fe-doped multiple-quantum-well saturable absorber on InP (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 4065-4067 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Excitonic saturable absorption on iron-doped InGaAs/InP multiple-quantum-well structures is studied by Fourier transform infrared spectroscopy and pump-probe measurement in the 1.55 μm wavelength range. The recovery time of the excitonic absorption bleaching is improved by iron doping and is found to vary from 7 ns on the undoped sample to 7 ps on the highest doped sample. The samples exhibit high optical switching with a differential optical transmission coefficient of more than 20% and a saturation fluence smaller than 47 μJ/cm2. Furthermore, we notice no degradation of the contrast ratio due to iron doping. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1381410
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Height dispersion control of InAs/InP quantum dots emitting at 1.55 μm (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 1751-1753 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A procedure of InAs/InP quantum dots elaboration emitting at 1.55 μm by gas source molecular beam epitaxy is described. It is based on a modification of the capping layer growth which is deposited in two steps, separated by a growth interruption under phosphorus flux. The main effect of this two step capping layer growth is to reduce the height of the biggest islands and thus to decrease the photoluminescence linewidth of the quantum dots emission line. Transmission electron microscopy and photoluminescence experiments show that quantum dots structure are still present after growth interruption under phosphorus flux and that the photoluminescence linewidth at 1.55 μm is reduced from 120 to 50 meV, thanks to this procedure. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1356449
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Notiz zu den Arbeiten über „dreiatomigen“ Wasserstoff (1932)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 15 (1932), S. 1137-1139 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.193201501128
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    Paper (German National Licenses)
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