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  • 1
    Electronic Resource
    Electronic Resource
    Gain-loss model for the dependence of the stimulated-emission transition in AlGaAs-GaAs quantum well heterostructures on photoexcitation geometry (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2518-2520 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The gain-loss laser oscillation condition is applied to photoexcitation geometries in which phonon-assisted laser operation is observed in AlGaAs-GaAs quantum well heterostructures (QWHs). The model is found to agree with a variety of experimental conditions in which cavity size, photoexcitation spot size, and mirror reflectivity are varied. Also, it serves to indicate further how others might have failed to observe phonon-assisted laser operation in QWHs and how photoexcitation geometries can be varied to verify these results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101080
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Broad-area semiconductor lasers with gain-length variation for lateral mode control: The bow-tie geometry laser (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 248-250 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A novel idea is proposed to control the spatial mode profile of broad-area semiconductor lasers in which the cumulative optical gain in the direction of light propagation is tailored by varying the effective length of the contact electrode across the lateral direction. Special interest is on a structure with the highest gain near the center of the device so as to favor the lower-order lateral modes of oscillation. Preliminary experiments indicate that the concept works as intended.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340453
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Multistage, monolithic ceramic microdischarge device having an active length of ∼0.27 mm (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 1340-1342 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A three-stage, multilayer ceramic microdischarge device, having an active length of ∼267 μm and a cylindrical discharge channel 140–150 μm in diameter, has been developed and operated continuously in Ne gas. Stable glow discharges are produced for pressures above 1 atm, operating voltages as low as 137 V (at 800 Torr), and specific power loadings of ∼40 kW cm−3. The V–I characteristics for a fired ceramic structure exhibit a negative resistance, whereas the resistance is positive prior to firing. The manufacturability of the fabrication process as well as the "flow-through" and multistage design of this device make it well suited for the excitation of gas microlasers or the dissociation of toxic or environmentally hazardous gases and vapors. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1352042
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    Paper (German National Licenses)
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