High performance 4.7 THz GaAs quantum cascade lasers based on four quantum wells. (2nd December 2016)

• Record Type: Journal Article
• Authors: Ohtani, Keita; Turčinková, Dana; Bonzon, Christopher; Benea-Chelmus, Ileana-Cristina; Beck, Mattias; Faist, Jérôme; Justen, Matthias; Graf, Urs U; Mertens, Marc; Stutzki, Jürgen
• Is Part Of: New journal of physics. Volume 18:Number 12(2016:Dec.)
• Publication Date: 2016-12-02
• Subjects: quantum cascade laser -- THz -- GaAs/AlGaAs; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/18/12/123004
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: GaAs/AlGaAs quantum cascade lasers based on four quantum well structures operating at 4.7 THz are reported. A large current density dynamic range is observed, leading to a maximum operation temperature of 150 K for the double metal waveguide device and a high peak output power more than 200 mW for the single surface plasmon waveguide device. A continuous wave, single mode, third order distributed feedback laser with a low electrical power dissipation and a narrow far-field beam pattern, which is required for a local oscillator in astronomy heterodyne spectrometers, is also demonstrated.