GaAs-based quantum cascade lasers
Influence of doping density on electron dynamics in GaAs/AlGaAs quantum cascade lasers
... set. Based on the space and energy shift invariance, they were afterwards used to create the states of all other ...are based on electron-phonon, electron-electron, and electron- impurity ...
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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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Investigation of thermal effects in quantum-cascade lasers
... and GaAs-based midinfrared QCLs. InP-based QCLs have been re- ported operating in CW above room temperature using a variety of thermal management techniques, while GaAs-based QCLs ...
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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
... of GaAs/ AlGaAs quantum cascade laser structures. It is based on the implementation of the simulated annealing algorithm with the purpose of determining a set of design parameters that satisfy ...
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Design Optimization for 4.1-THZ Quantum Cascade Lasers
... Abstract: We present an optimized design for GaAs/AlGaAs quantum cascade lasers operating at 4.1THz. This was based on a three-well active module with diagonal radiative transition. ...
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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 ...been based on a InGaAs/AlInAs structure so that the growth could be lattice matched to InP ...been ...
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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 ...
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A physical model of quantum cascade lasers: Application to GaAs, GaN and SiGe devices
... the mechanism of double-phonon resonance depopulation (2LO QCL) of the lower laser level, (success- fully implemented in continuous wave room-temperature InP-based mid-infrared QCL [11, 32]), has been grown at the ...
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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
... Here, we present the fabrication of THz frequency quantum cascade lasers (QCLs) emitting at 3.5 THz, as well as a new and robust integration scheme. The paper is organized as follows. In section 2, ...
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Terahertz imaging using quantum cascade lasers — a review of systems and applications
... sub-kilohertz quantum-noise-limited linewidths [36] and also offer potential for tunability ...imaging based on the self-mixing (SM) phenomenon in THz QCLs, for long-range imaging, three- dimensional ...
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Coupled-cavity terahertz quantum cascade lasers for single mode operation
... sented in Fig. 5, the maximum emitted power at a heat sink temperature of 13 K is in excess of 3.5 mW. The latter was measured with a calibrated THz power meter and was not corrected for the polyethylene window ...
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Optical feedback effects on terahertz quantum cascade lasers: modelling and applications
... [65] Grier, A., Dean, P., Valavanis, A., Keeley, J., Kundu, I., Cooper, J., Agnew, G., Taimre, T., Lim, Y. L., Bertling, K., Rakić, A. D., Li, L., Harrison, P., Linfield, E. H., Ikonić, Z., Davies, A. G., and Indjin, D., ...
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Discrete Vernier tuning in terahertz quantum cascade lasers using coupled cavities
... In the second approach, the amplitude of the tuning pulse was varied, while the time-delay was fixed at 8 µs to ensure thermal equilibration of the tuning section. Single-mode emission with an SMSR of 15 dB was observed ...
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Optical Gain and Confinement in Gaas/Algaas Structure Quantum Well Lasers
... 67 In a quantum well structure, the two dimensional nature of the density of states changes the gain curve. In three dimensions, the density of states increases with energy. As a result of injection increases, the ...
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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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Temperature dependent high speed dynamics of terahertz quantum cascade lasers
... The exemplar laser modeled in this paper is a bound-to- continuum (BTC) type QCL, a device that is particularly challenging to model and optimize due to the relatively large number of quantum-confined subbands in ...
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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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