mid-infrared quantum cascade lasers
Optical sideband generation up to room temperature with mid-infrared quantum cascade lasers
... The temperature evolution of the sideband signal is shown in Fig. 5, for a 1.5 mm long QCL with a 7 µm ridge together with the light-current (LI) characteristics of the lasers (inset). The output power was ...
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Towards automated design of quantum cascade lasers
... AlGaAs quantum cascade laser ...GaAs-based mid-infrared quantum cascade lasers and presents the output characteristics of some of the designed optimized ...
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Thermal effects in InGaAs/AlAsSb quantum-cascade lasers
... times smaller than those found in standard ridge waveguides. In this present work, the thermal model was used to investigate the thermal dynamics in a near-infrared InGaAs/AlAsSb QCL but it is equally applicable ...
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Self-consistent solutions to the intersubband rate equations in quantum cascade lasers: Analysis of a GaAs/AlxGa1-xAs device
... Quantum cascade lasers have been the focus of much research since they were developed in ...operational quantum cas- cade lasers are in the mid-infrared frequency range ...
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Discrete Vernier tuning in terahertz quantum cascade lasers using coupled cavities
... Terahertz-frequency quantum cascade lasers (THz QCLs) are compact solid-state sources of coherent radiation in the 1–5 THz region of the electromagnetic spectrum [1], with output powers in excess of ...
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Planar integrated metasurfaces for highly-collimated terahertz quantum cascade lasers
... Although the use of SPs in these types of devices has proven successful in the visible to mid-infrared regions of the spectrum, the SP concept cannot be easily translated into the terahertz (THz) region. ...
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Development of Terahertz Frequency Quantum Cascade Lasers for the Applications as Local Oscillators
... and mid- infrared (TERA-MIR) frequencies, and this has fuelled interest in developing ma- terials, devices and systems for generating and detecting TERA-MIR radiation [1, ...2]. ...
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Fast modulation of terahertz quantum cascade lasers using graphene loaded plasmonic antennas
... the mid-infrared/terahertz spectral range for spectroscopic applications, 11-13 modulation, 14-18 emission and detection 19-22 and more fundamental physical ...
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Low Power Consumption Substrate Emitting DFB Quantum Cascade Lasers
... years, quantum cascade lasers (QCLs) have undergone a rapid development and become the most promising source in the mid-infrared frequency region ...
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High order sideband generation in terahertz quantum cascade lasers
... Quantum Cascade Lasers (QCLs) are powerful intersub- band laser sources operating throughout the mid-infrared (MIR) 1 and terahertz (THz) 2 spectral ...
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Interface intermixing in type II InAs/GaInAsSb quantum wells designed for active regions of mid infrared emitting interband cascade lasers
... Optimization of type II quantum well (QW) structures, serving as the active region, is crucial for final device per- formance. One of the concepts of how to improve the per- formance and expand the possible ICL ...
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Interface Intermixing in Type II InAs/GaInAsSb Quantum Wells Designed for Active Regions of Mid Infrared Emitting Interband Cascade Lasers
... In this work, we investigate the interface intermixing in the type II structures of InAs/GaIn(As)Sb/InAs and its consequences to the QW electronic structure and op- tical properties. We compare the results of ...
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Mid-Infrared Supercontinuum Generation in Chalcogenides
... The development of every technology experiences an initially crude stage. Compared to globars, synchrotrons or quantum cascade lasers which are technologically mature, the achievements using SC ...
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Aspects of the internal physics of InGaAs/InAlAs quantum cascade lasers
... the quantum cascade structure is described within a tight-binding-like picture, where any state in the long cascade is associated with one of its ...a cascade to be constructed as replicas, ...
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Temperature dependent high speed dynamics of terahertz quantum cascade lasers
... finger which is usually (but not necessarily) constant. Although the RREs are expressed in terms of a current forc- ing function I(t), terminal voltage V (t) is also required by the equations for two reasons: (i) ...
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Optical feedback effects on terahertz quantum cascade lasers: modelling and applications
... [16] Han, S., Bertling, K., Dean, P., Keeley, J., Burnett, A. D., Lim, Y. L., Khanna, S. P., Valavanis, A., Linfield, E. H., Davies, A. G., Indjin, D., Taimre, T., and Rakić, A. D., “Laser feedback interferometry as a ...
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Silver-based surface plasmon waveguide for terahertz quantum cascade lasers
... Terahertz-frequency quantum cascade lasers (THz QCLs) based on ridge waveguides incorporating silver waveguide layers have been investigated theoretically and experimentally, and compared with ...
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Optimizing optical nonlinearities in GaInAs/AlInAs quantum cascade lasers
... of mid-in fra red and terahertz quan tum cas cade la sers, suc cess in ac cess ing the ~3-4 mm re gion of the elec tro mag - netic spec trum has re mained lim ...
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Coupled-cavity terahertz quantum cascade lasers for single mode operation
... (315 GHz, 155 GHz, 115 GHz, and 80 GHz for cavity lengths of 125 lm, 255 lm, 350 lm, and 515 lm, respectively). In an effective mirror picture, this is produced by the etalon effect of the short cavity þ air gap, which ...
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Terahertz imaging using quantum cascade lasers — a review of systems and applications
... of quantum engineering of the heterostructure and by exploiting the Stark effect; by using a shorter lasing cavity (∼2 mm) to increase the effective mirror losses, a higher applied field at lasing threshold was ...
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