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7 April 1998 Mid-IR intersubband quantum cascade lasers
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Quantum cascade lasers are new light sources in the mid- infrared (3.5 - 12 micrometer), based on resonant tunneling and optical transitions between quantised conduction band states. Quantum engineering of electronic energy levels and tailoring of the wavefunctions are used to obtain population inversion and optimize the overall laser performance. Advanced structures from a point of view of the quantum design, such as two wavelength emitters, are presented. New waveguide confinement based on surface plasmon are also discussed. In this configuration it is shown that optical confinement can be achieved without the growth of cladding layers. The paper concludes with a general comparative discussion between GaAs/AlGaAs and GaInAs/AlInAs material systems for the new generations of quantum cascade lasers.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Carlo Sirtori, Federico Capasso, Jerome Faist, Alfred Y. Cho, Philippe Collot, Vincent Berger, and Julien Nagle "Mid-IR intersubband quantum cascade lasers", Proc. SPIE 3284, In-Plane Semiconductor Lasers: from Ultraviolet to Mid-Infrared II, (7 April 1998);


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