Results 11 to 20 of about 16,866 (296)
MOVPE-Grown Quantum Cascade Laser Structures Studied by Kelvin Probe Force Microscopy
Crystals, 2020 A technique for direct study of the distribution of the applied voltage within a quantum cascade laser (QCL) has been developed. The detailed profile of the potential in the laser claddings and laser core region has been obtained by gradient scanning ...
Konstantin Ladutenko +3 more
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Broadband THz quantum cascade laser frequency combs with surface emission and inverse-designed facet reflectors [PDF]
EPJ Web of Conferences, 2023 We present a planarized waveguide cavity with an integrated broadband output coupler that improves both the output power and far-field properties of THz quantum cascade laser frequency combs. The laser mirror reflectivity can be tuned by the shape of the
Senica Urban +5 more
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Photonics, 2023 In this article, we report a high-performance λ ~ 4.6 μm quantum cascade laser grown by metal-organic chemical vapor deposition. Continuous wave power of 3 W was obtained from an 8 mm-long and 7.5 μm wide coated laser at 285 K.
Teng Fei +12 more
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Field-resolved high-order sub-cycle nonlinearities in a terahertz semiconductor laser
Light: Science & Applications, 2021 Two-dimensional terahertz strong-field spectroscopy reveals wave-mixing processes up to eighth order in a free-running quantum cascade laser, unraveling its sub-cycle gain dynamics and nonlinearities in a regime of negative absorption.
J. Riepl +13 more
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Quantum cascade laser frequency comb locked with 200 mrad residual phase noise [PDF]
EPJ Web of Conferences, 2023 Using near-infrared light, we tightly-lock a mid-infrared quantum cascade laser frequency comb to another laser, achieving a residual integrated phase noise of 200 mrad.
Komagata Kenichi N. +6 more
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Quantum dot cascade laser [PDF]
Nanoscale Research Letters, 2014 Abstract We demonstrated an unambiguous quantum dot cascade laser based on InGaAs/GaAs/InAs/InAlAs heterostructure by making use of self-assembled quantum dots in the Stranski-Krastanow growth mode and two-step strain compensation active region design.
Zhuo, N +6 more
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APL Photonics, 2023 Terahertz quantum cascade laser sources based on intra-cavity Cherenkov difference-frequency generation in dual-wavelength mid-infrared quantum cascade lasers are currently the only monolithic semiconductor laser technology that can deliver continuous ...
Wolfhard Oberhausen +7 more
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Room temperature quantum cascade laser with ∼31% wall-plug efficiency
AIP Advances, 2020 In this article, we report the demonstration of a quantum cascade laser emitting at λ ≈ 4.9 μm with a wall-plug efficiency of ∼31% and an output power of ∼23 W in pulsed operation at room temperature with 50 cascade stages (Ns).
F. Wang +3 more
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Mid-Infrared Quantum-Dot Quantum Cascade Laser: A Theoretical Feasibility Study
Photonics, 2016 In the framework of a microscopic model for intersubband gain from electrically pumped quantum-dot structures we investigate electrically pumped quantum-dots as active material for a mid-infrared quantum cascade laser.
Stephan Michael +2 more
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Physics Today, 2014 This chapter describes the most commonly used approaches for computing the band structure of active materials with intersubband optical transitions. The physics of quantum cascade lasers (QCLs) is discussed in detail, including the mechanisms that limit the threshold current density, threshold voltage, wall-plug efficiency, and temperature sensitivity ...
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