Quantum cascade lasers

Author

Capasso, Federico

Author_Institution

Lucent Technol., AT&T Bell Labs., Murray Hill, NJ, USA

fYear

1999

fDate

28-28 May 1999

Firstpage

25

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/CLEO.1999.833828

Filename

833828