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9 March 2022 THz quantum cascade laser circuits
Benedikt Limbacher, Michael Jaidl, Marie Ertl, Martin Kainz, Sebastian Schönhuber, Juraj Darmo, Aaron M. Andrews, Gottfried Strasser, Karl Unterrainer
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Proceedings Volume PC12021, Novel In-Plane Semiconductor Lasers XXI; PC120210C (2022) https://doi.org/10.1117/12.2607148
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
The study of high Al containing barriers in Terahertz Quantum Cascade lasers has led to the improvement of operation temperature and of the quantum efficiency. This is mainly caused by the reduction of transport channels through higher states. In consequence, the electron transport in these new devices is dominated by photon assisted tunneling. The originating non-linearity provides a huge potential for different operation modes. We try to further study this by coupling distributed QCL devices on a chip which has led to the observation of bi-stable operation and THz switching. We use the non-linear behavior for the control of the emission spectra of surface emitting random laser structures. Furthermore, ring structures can be realized which can be tuned from single mode to frequency comb operation.
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Benedikt Limbacher, Michael Jaidl, Marie Ertl, Martin Kainz, Sebastian Schönhuber, Juraj Darmo, Aaron M. Andrews, Gottfried Strasser, and Karl Unterrainer "THz quantum cascade laser circuits", Proc. SPIE PC12021, Novel In-Plane Semiconductor Lasers XXI, PC120210C (9 March 2022); https://doi.org/10.1117/12.2607148
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KEYWORDS
Quantum cascade lasers
Terahertz radiation
Aluminum
Electron transport
Frequency combs
Quantum efficiency
Random lasers
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