High performance 4.7 THz GaAs quantum cascade lasers based on four quantum wells

oleh: Keita Ohtani, Dana Turčinková, Christopher Bonzon, Ileana-Cristina Benea-Chelmus, Mattias Beck, Jérôme Faist, Matthias Justen, Urs U Graf, Marc Mertens, Jürgen Stutzki

Format: Article
Diterbitkan: IOP Publishing 2016-01-01

Deskripsi

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.