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Publikováno v:
Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Technical Digest (IEEE Cat. No.01CH37170).
Summary form only given. Quantum cascade (QC) lasers have already demonstrated very encouraging results at wavelengths longer than 4 /spl mu/m. In these devices based on intersubband transitions, the highest attainable photon energy is limited by the