A simple semi-phenomenological model, which accurately predicts the dependence of thresholdcurrent for temperature of Resonant-phonon three well quantum cascade laser based on verticaltransitions is offered. We found that, the longitude optical phonon scattering of thermally excitedelectrons is the most important limiting factor for thermal performance of high frequency THz QCLs.In low frequenc...

Articles you may be interested in InAs/AlSb widely tunable external cavity quantum cascade laser around 3.2 μm Room temperature single-mode terahertz sources based on intracavity difference-frequency generation in quantum cascade lasers Appl. Terahertz sources based on intracavity frequency mixing in mid-infrared quantum cascade lasers with passive nonlinear sections Appl. Surface-emitting tera...

Articles you may be interested in Distributed feedback terahertz frequency quantum cascade lasers with dual periodicity gratings Appl. Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes Appl. High order sideband generation in terahertz quantum cascade lasers Appl. High frequency modulation of mid-infrared quantum cascade...

We present here a novel design to form an artificial quantum dot with electrical confinement and apply it to a Quantum Cascade Laser structure to realize a Quantum Dot Cascade Laser. A two-dimensional finite element method has been used to numerically simulate the novel design of electrical formation of an artificial quantum dot. The size of the quantum dot is electrically tunable and can be ap...

We present simulations of midand far-infrared quantum cascade lasers operating with/without external magnetic field. Maxwell–Bloch solver based on the finite-difference time-domain method was used in our investigation. Reduction of the far-infrared quantum cascade laser emission intensity is associated with increased optical losses in highly doped layers when magnetic field is changed from 4.2 ...

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Articles you may be interested in High power, widely tunable, mode-hop free, continuous wave external cavity quantum cascade laser for multi-species trace gas detection Appl. Design for high-power, single-lobe, grating-surface-emitting quantum cascade lasers enabled by plasmon-enhanced absorption of antisymmetric modes Appl. High-performance uncooled distributed-feedback quantum cascade laser w...

We demonstrate a novel laser design for room temperature THz emission from a quantum cascade laser. The device concept is based on THz emission by difference-frequency generation in mid-infrared quantum cascade lasers with giant nonlinear properties. In contrast to previously demonstrated lasers the presented design significantly simplifies and improves the active medium of the quantum cascade ...