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  • American Institute of Physics (AIP)  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 3685-3687 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Grating coupled surface emitting lasers with rectangular as well as blazed grating outcouplers were investigated. Horizontal cavity InGaAs/AlGaAs laser oscillators, with two rectangular first order surface gratings as feedback elements, were integrated with single detuned rectangular or blazed second order gratings as surface output couplers, using electron beam lithography and chemically assisted ion beam etching. Superior differential quantum and surface emission efficiencies of 56% and 84%, respectively, were measured for lasers with optimized blazed output couplers. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 2990-2992 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Grating-coupled surface-emitting InGaAs/AlGaAs lasers with a single large area output coupler were fabricated by integrating a second order surface grating with corner reflectors. The grating as well as the corner reflectors were fabricated using electron beam lithography and chemically assisted ion beam etching, producing a uniform rectangular grating and high quality corner facets. A thin etch-stop layer incorporated in the epitaxial structure made it possible to combine precise control of the grating position with a strained layer SQW-GRINSCH structure. Well behaved lateral modes were observed in 70-μm-wide lasers, emitting narrow beams in both the lateral and the longitudinal direction. Threshold current densities as low as 99 A/cm2 were measured for 1200-μm-long lasers.
    Type of Medium: Electronic Resource
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