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  • 1
    Electronic Resource
    Electronic Resource
    Peak-to-valley current ratios as high as 50:1 at room temperature in pseudomorphic In0.53Ga0.47As/AlAs/InAs resonant tunneling diodes (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 2475-2477 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Pseudomorphic In0.53Ga0.47As/AlAs/InAs resonant tunneling diodes with the highest peak-to-valley current ratios reported to date have been fabricated on InP substrates with molecular beam epitaxy. Peak-to-valley current ratios as high as 50:1 at 300 K are obtained. The majority of the devices on the sample have a peak-to-valley current ratio of 42 at 300 K and 85 at 77 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351085
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  • 2
    Electronic Resource
    Electronic Resource
    Intrawell and interwell intersubband transitions in multiple quantum wells for far-infrared sources (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 9305-9320 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A theoretical study of electrically pumped unipolar lasers exploiting intrawell or interwell intersubband radiative transitions in multiple quantum-well heterostructures for the generation of IR and FIR radiation is presented. The feasibility of these coherent sources critically depends on the non-radiative intersubband transition rates. Numerical simulations of acoustical phonon, optical-phonon, and electron-electron scattering were implemented, including their temperature dependence. For far-infrared coherent sources, electron-electron scattering emerges as the dominating non-radiative relaxation mechanism. Interwell schemes offer distinctive advantages such as simplicity in design, greater tolerance in design and fabrication errors, field tunability of the emission frequency, improved internal quantum efficiency and aid in establishing population inversion. Design rules are put forward for such long wavelength sources. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362607
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetotunneling spectroscopy in wide In0.53Ga0.47As/In0.52Al0.48As double quantum wells (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 2225-2227 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetoquantum oscillations in the tunnel current of wide In0.53Ga0.47As/In0.52Al0.48As double quantum wells have been exploited to trace the energy levels in the adjacent wells as a function of the applied voltage. The dominant inelastic scattering mechanism was identified as GaAs-like longitudinal-optical-phonon emission. This powerful spectroscopy probe allows an unambiguous identification of the transmission channels responsible for the peaks observed in the current-voltage characteristics and provides a large number of consistency checks. The obtained experimental results can be used to verify the accuracy of self-consistent simulation programs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110534
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  • 4
    Electronic Resource
    Electronic Resource
    Quantum physics Wheels within wheels (2003)
    [s.l.] : Nature Publishing Group
    Nature 422 (2003), S. 391-392 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Problems involving many strongly interacting bodies are pervasive in physics. For instance, in a cubic centimetre of condensed matter, typically 1023 electrons repel one another and interact with a comparable number of positively charged nuclei. The motion of one electron elicits a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/422391a
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