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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 |
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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.