mid-infrared quantum well lasers
Optical sideband generation up to room temperature with mid-infrared quantum cascade lasers
... an AR thickness of 2 µm, with each period n-doped to 1.4 × 10 17 cm 3 . In order to achieve resonant frequency mixing it is important to consider both the waveguide modes of the MIR QCL emission and the external NIR ...
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Self-consistent solutions to the intersubband rate equations in quantum cascade lasers: Analysis of a GaAs/AlxGa1-xAs device
... a mid-infrared quantum cascade laser has been used to calculate the subband populations and transition rates for a nine-level system consisting of two injectors and an active ...
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Interface intermixing in type II InAs/GaInAsSb quantum wells designed for active regions of mid infrared emitting interband cascade lasers
... semiconductor lasers in this spectral range. The first, based on type I quantum well structures, is limited to below 4 μm due to the accessible band gaps and band offsets in a combination of ...
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Polarization entangled mid infrared photon generation in p doped semiconductor quantum wells
... asymmetric quantum wells, and the simplest structures of this type are double quantum wells (DQW) and step quantum ...technologically well developed AlGaAs system, the variable-width ...
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Interface Intermixing in Type II InAs/GaInAsSb Quantum Wells Designed for Active Regions of Mid Infrared Emitting Interband Cascade Lasers
... semiconductor lasers in this spectral range. The first, based on type I quantum well structures, is limited to below 4 μm due to the accessible band gaps and band offsets in a combination 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 generation ...
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Room temperature carrier kinetics in the W type GaInAsSb/InAs/AlSb quantum well structure emitting in mid infrared spectral range
... W-design quantum wells (QWs) of a stag- gered band alignment, based on an InAs/GaInSb com- bination, have been developed as a key element of the gain medium of interband cascade lasers (ICLs) emitting in ...
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Gain optimization in optically pumped AlGaAs unipolar quantum-well lasers
... in quantum wells (QWs) by Kazarinov and Suris in 1971 [1], there has been considerable research effort in this ...unipolar lasers have been proposed, and some of them realized, the most important of which ...
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Investigation and Application of Microscale Semiconductor Lasers and Cavities
... as well as the fabrication process development that is a combination of science and a finely tuned black ...(QC) lasers for absorption spectroscopy in the mid infrared ...cavity quantum ...
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Rare earth doped gallium lanthanum sulphide glasses for mid infrared fibre lasers
... the mid-infrared with a focus on mid- infrared ...and quantum efficiencies from the Judd-Ofelt theory, the Füchtbauer-Ladenburg equation, and the McCumber ...
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Mid infrared entangled photon generation in optimised asymmetric semiconductor quantum wells
... pump photons into two photons with the ratio of their frequencies either 2:1 or 3:1). The actual values of pump or signal photon energies were then varied around the design values, and the transition linewidth was also ...
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Quantum cascade laser-based mid-infrared spectrochemical imaging of tissue and biofluids
... Transform infrared (FT-IR) spectrometers, that incorporate large liquid nitrogen cooled focal plane array (FPA) detectors within an infrared microscope system, have no doubt accelerated the development of ...
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Coherent imaging using laser feedback interferometry with pulsed-mode terahertz quantum cascade lasers
... The laser was driven using a custom-built laser pulse driver. This piece of hardware both generated the current pulses to drive the laser as well as recovered the small SM signal superimposed on the resulting ...
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Influence of delta doping on the hole capture probability in Ge/Si quantum dot mid infrared photodetectors
... a four-zone trapping mechanism proposed for quantum well intersubband photodetectors in [25] and is illus- trated in an inset of Figure 4. At a positive bias polarity, the photoexcited holes drift toward ...
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Responsivity of quantum well infrared photodetectors at terahertz detection wavelengths
... In this article, a simplified unifying model is presented with the aid of some of the definitions and assumptions from the models mentioned before. It starts by defining the photo- current in a simple detector and ...
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High quality electron beam acceleration by ionization injection in laser wakefields with mid-infrared dual-color lasers
... Figure 1(a) shows the ionization probability after one laser cycle vs. electric field amplitude either for 2 . 4 µ m or for 0 . 8 µ m lasers. Only the first K-shell electrons are considered. We do not consider the ...
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Double-barrier Superlattice Infrared Photodetector Integrated with Multiple Quantum-Well Infrared Photodetector to Improve Performance
... polarized infrared light to radiate on the ...the infrared source in FTIR is first amplified and converted to voltage signal by a low noise current preamplifier (Stanford Research SR570), and then input to ...
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Comparative Modeling of Infrared Fiber Lasers
... fiber lasers facilitate the process of their practical ...fiber lasers which operate at wavelengths exceeding 2000 ...fiber lasers operating within the infrared wavelength region beyond 2000 ...
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Temperature Dependent High Speed Dynamics of Terahertz Quantum Cascade Lasers
... of quantum wells, superlattices, quantum-cascade lasers, and quantum-well infrared photodetectors from near- to far-infrared and terahertz spectral ...of ...
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A study of photomodulated reflectance on staircase like, n doped GaAs/Alx Ga1−xAs quantum well structures
... Quantum well infrared photodetector (QWIP) structures have been developed since 1990s ...multi- quantum wells (MQW) or superlattice ...stepped quantum wells [3], and stepped ...
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