GaAs quantum cascade lasers
Influence of doping density on electron dynamics in GaAs/AlGaAs quantum cascade lasers
... A detailed theoretical and experimental study of the influence of injector doping on the output characteristics and electron heating in midinfrared GaAs/ AlGaAs quantum cascade lasers is ...
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Hot-phonon generation in THz quantum cascade lasers
... In semiconductor structures the emission of optical phonon is the dominant process that controls the energy relaxation of carriers and the typical value for the electron-optical phonon scattering rate is (2ps) -1 . The ...
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Towards automated design of quantum cascade lasers
... Quantum cascade lasers sQCLsd pioneered by the Lucent group 1 are sophisticated infrared light sources with emission wavelengths that can be tuned by engineering the electronic energy states and wave ...
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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 ...a GaAs/AlGaAs structure, which is a material more commonly used in com- pound ...operational ...
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Design Optimization for 4.1-THZ Quantum Cascade Lasers
... (anticrossing), one may devise a design that reduces this anticrossing and hence the parasitic current density which in turn reduces the threshold current density. One way to implement this is to separate the injector ...
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Thermal effects in InGaAs/AlAsSb quantum-cascade lasers
... in GaAs-based ...that GaAs has a lower ther- mal conductivity than InP means that knowledge of the ther- mal dynamics inside GaAs-based QCLs must be understood in order to close the gap in ...
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High order sideband generation in terahertz quantum cascade lasers
... can be obtained for the 1st order efficiency based on the sec- ond order nonlinearity v (2) . 19 Assuming that the pump beam losses (1000 cm 1 ) are the predominant factor for the effi- ciency such that the phase ...
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Aspects of the internal physics of InGaAs/InAlAs quantum cascade lasers
... midinfrared quantum cascade laser 共QCL兲 designed to operate in continuous wave mode at room temperature 关Beck et ...analogous GaAs based midinfrared ...
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Silver-based surface plasmon waveguide for terahertz quantum cascade lasers
... in the waveguide cladding thickness, which is particularly advantageous for terahertz (THz) frequency QCLs since the growth of suitably thick dielectric waveguides is impractical. Indeed, the first THz QCL employed a ...
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Development of Terahertz Frequency Quantum Cascade Lasers for the Applications as Local Oscillators
... QCL devices were processed according to the configuration of a semi- insulating-substrate-surface-plasmon (SISP) waveguide [4] or a double-metal (DM) waveguide [13]. For the SISP waveguide, laser ridges were defined by ...
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Coupled-cavity terahertz quantum cascade lasers for single mode operation
... the GaAs bulk permittivity found in ...insulating GaAs), with weights being derived from the FDFD simulations by computing the integral of the normal- ized field intensity at mid gap in each ...
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The MBE growth and optimization of high performance terahertz frequency quantum cascade lasers
... for GaAs is plotted in Fig. 2, as a function of the total deposited GaAs layer thickness in the growth ...for GaAs growth rate drifts, but variation in AlAs growth rate can be ...exact GaAs ...
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A physical model of quantum cascade lasers: Application to GaAs, GaN and SiGe devices
... biased cascade the alignment of the HH1 subband from the “preceding” (higher) well and the LH1 subband of the next (lower) well, both at zone centre, occurs at a field of 42 ...
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Investigation of thermal effects in quantum-cascade lasers
... and GaAs-based midinfrared ...while GaAs-based QCLs operating at room temperature have been limited to pulsed ...mode. GaAs has a lower thermal conductivity than InP and so knowl- edge of the thermal ...
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Ultrasmall microdisk and microring lasers based on InAs/InGaAs/GaAs quantum dots
... Semiconductor microdisks (MDs) and microrings (MRs) are presently attracting increasing attention as key ele- ments of future photonic integrated circuits. They can be used as low-threshold microlasers [1,2], modulators ...
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Optically pumped intersublevel midinfrared lasers based on InAs-GaAs quantum dots
... The dots considered here are in the strong confinement regime where the electron-electron interaction energy (which is of the order of 10 meV per electron pair [32]) is much smaller than the effective confinement ...
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How To Understand The Physics Of Midinfrared Light From A Laser
... Talukder, “Analytical and computational study of self-induced transparency mode-locking in quantum cascade lasers,” Computer Science and Electrical Engineering Research Review, UMBC (200[r] ...
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Surface plasmon waveguides with gradually doped or NiAl intermetallic compound buried contact for terahertz quantum cascade lasers
... Indjin, D., Ikonic, Z., Harrison, P. et al. (1 more author) (2003) Surface plasmon waveguides with gradually doped or NiAl intermetallic compound buried contact for terahertz quantum cascade lasers. ...
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Temperature dependent high speed dynamics of terahertz quantum cascade lasers
... The terahertz (THz) band of frequencies [1] has become increasingly accessible in recent years via emerging technolo- gies for generating and detecting THz radiation. Amongst the many potential applications are broadband ...
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Planar integrated metasurfaces for highly-collimated terahertz quantum cascade lasers
... frequency quantum cascade lasers (QCLs) with metasurface waveguides that are designed to be spoof surface plasmon (SSP) out-couplers by introducing periodically arranged SSP ...
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