Title :
Quantum cascade lasers
Author :
Capasso, Federico
Author_Institution :
Lucent Technol., AT&T Bell Labs., Murray Hill, NJ, USA
Abstract :
Summary form only given. Quantum cascade (QC) lasers are fundamentally new semiconductor light sources in two respects. Their wavelength is not determined by the band gap of the material and can be tailored over a wide range of the mid-infrared region (3.4 /spl mu/m to 17 /spl mu/m) using the same combination of materials by a suitable choice of the active layer thicknesses. This tutorial will emphasize the underlying physics, design principles and performance of QC lasers based on intersubband transitions. Recent results on high-resolution spectroscopy will be presented and applications to chemical sensors for trace gas analysis with part per billion sensitivities.
Keywords :
chemical sensors; infrared sources; infrared spectroscopy; laser transitions; optical resolving power; quantum well lasers; spectrochemical analysis; active layer thicknesses; band gap; chemical sensors; design principles; high-resolution spectrometers; high-resolution spectroscopy; intersubband transitions; mid-infrared region; part per billion sensitivities; quantum cascade lasers; semiconductor light sources; trace gas analysis; underlying physics; Chemical lasers; Gas lasers; Light sources; Optical design; Optical materials; Photonic band gap; Physics; Quantum cascade lasers; Semiconductor lasers; Semiconductor materials;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-595-1
DOI :
10.1109/CLEO.1999.833828
