Journal Article10.1063/1.3377008
Electrically tunable, high performance quantum cascade laser
76
TL;DR: In this article, a quantum cascade laser design for wide voltage-tuning, emitting at ∼8.5μm, is presented based on a diagonal bound-to-continuum design.
read more
Abstract: A quantum cascade laser design for wide voltage-tuning, emitting at ∼8.5 μm, is presented based on a diagonal bound-to-continuum design. The relatively short period length and the diagonal nature of the laser transition guarantees a wide tuning of the emission due to the linear Stark shift effect. Tuning of both the spontaneous and stimulated emission is presented over almost 100 cm−1. In spite of the large tuning, laser performance are comparable with the best results present in literature in this spectral range. In particular, continuous wave operation up to 450 mW and pulsed wall plug efficiencies up to 11.5% were measured at 300 K. A transport model, based on the density matrix formalism, was used to simulate spontaneous and stimulated emission as function of the applied field. Same model was also used to predict light-current-voltage characteristics of the lasers.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
λ~7.1 μm quantum cascade lasers with 19% wall-plug efficiency at room temperature
TL;DR: A model for backfilling of the lower laser level which takes into account the number of subbands in the injector is presented and applied to determine the optimum value of the voltage defect to maximize wall-plug efficiency at room temperature, which is found to be ~100 meV, in good agreement with experimental results.
78
Watt-Level Continuous-Wave Emission from a Bifunctional Quantum Cascade Laser/Detector.
Benedikt Schwarz,Christine A. Wang,Leo J. Missaggia,Tobias S. Mansuripur,Paul Chevalier,Michael K. Connors,Daniel McNulty,Jeffrey G. Cederberg,Gottfried Strasser,Federico Capasso +9 more
TL;DR: This work presents a high performance bifunctional device for 8 μm capable of 1 W single facet continuous wave emission at 15 °C and demonstrates that b ifunctional operation can be realized at longer wavelength, where wavelength matching becomes increasingly difficult and that the price to be paid in terms of performance is negligible.
73
Comparative analysis of quantum cascade laser modeling based on density matrices and non-equilibrium Green's functions
M. Lindskog,Johanna Wolf,Virginie Trinité,V. Liverini,Jérôme Faist,Gregory Maisons,Mathieu Carras,R. Aidam,R. Ostendorf,Andreas Wacker +9 more
TL;DR: In this article, the operation of an 8.5μm quantum cascade laser based on GaInAs/AlInAs lattice matched to InP using three different simulation models based on density matrix (DM) and non-equilibrium Green's function (NEGF) formulations was studied.
Modeling of Mid-Infrared Quantum Cascade Laser by Means of Nonequilibrium Green's Functions
TL;DR: In this article, nonequilibrium Green's function (NEGF) calculations of mid-infrared quantum cascade laser (QCL) that preserve real-space basis have been performed.
57
High power operation of λ ∼ 5.2–11 μm strain balanced quantum cascade lasers based on the same material composition
TL;DR: In this paper, a technique based on composite quantum wells for design and growth of strain balanced Al0.63In0.37As provides good electron confinement at all wavelengths, and strain balancing can be achieved through composite wells of Ga0.65As/Ga0.53As for different wavelength.
47
References
Continuous wave operation of a mid-infrared semiconductor laser at room temperature.
Mattias Beck,Daniel Hofstetter,Thierry Aellen,Jérôme Faist,Ursula Oesterle,Marc Ilegems,Emilio Gini,H. Melchior +7 more
TL;DR: The results demonstrate the potential of quantum cascade lasers as continuous wave mid-infrared light sources for high-resolution spectroscopy, chemical sensing applications, and free-space optical communication systems.
Role of interface roughness in the transport and lasing characteristics of quantum-cascade lasers
Jacob B. Khurgin,Yamac Dikmelik,Peter Q. Liu,Anthony J. Hoffman,Matthew D. Escarra,Kale J. Franz,Claire F. Gmachl +6 more
TL;DR: In this paper, a density-matrix based theory of transport and lasing in quantum-cascade lasers is proposed, which reveals that large disparity between luminescent linewidth and broadening of the tunneling transition changes the design guidelines to favor strong coupling between injector and upper laser level.
94
High power thermoelectrically cooled and uncooled quantum cascade lasers with optimized reflectivity facet coatings
Richard Maulini,Arkadiy Lyakh,Alexei Tsekoun,Rowel Go,Christian Pflügl,Laurent Diehl,Federico Capasso,C. Kumar N. Patel +7 more
TL;DR: In this article, a method of preserving the device wall-plug efficiency by adjusting mirror losses with facet coatings for longer cavity quantum cascade lasers was presented, which resulted in continuous-wave output power of 2.9 W at 293 K for thermoelectrically cooled devices mounted on AlN submounts.
Mid-infrared trace-gas sensing with a quasi- continuous-wave Peltier-cooled distributed feedback quantum cascade laser
Damien Weidmann,Frank K. Tittel,Thierry Aellen,Mattias Beck,Daniel Hofstetter,Jérôme Faist,Stéphane Blaser +6 more
TL;DR: In this article, a distributed feedback quantum cascade laser (QCL) capable of thermoelectric-cooled (TEC) continuous-wave (cw) operation and emitting at ∼9 μm is used to perform laser chemical sensing by tunable infrared spectroscopy.
Electrically tunable, room-temperature quantum-cascade lasers
TL;DR: In this article, the authors investigated the tuning of two-section quantum-cascade lasers as a function of temperature and optical power, and obtained a tuning range of 40 cm−1, corresponding to a wavelength tune from 9.75 to 10.15 μm.
51