Results 21 to 30 of about 52,939 (282)
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
doaj +1 more source
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
doaj +1 more source
Femtosecond pulses from a mid-infrared quantum cascade laser. [PDF]
Nat Photonics, 2021 Täschler P +7 more
europepmc +2 more sources
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
doaj +1 more source
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
doaj +1 more source
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
openaire +2 more sources
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
doaj +1 more source
Single mode terahertz quantum cascade amplifier [PDF]
, 2014 A terahertz (THz) optical amplifier based on a 2.9 THz quantum cascade laser (QCL) structure has been demonstrated. By depositing an antireflective coating on the QCL facet, the laser mirror losses are enhanced to fully suppress the lasing action ...
Beere, H.E. +8 more
core +5 more sources
Quantum cascade lasers with an integrated polarization mode converter [PDF]
, 2012 We discuss the design, fabrication and characterization of waveguide polarization mode converters for quantum cascade lasers operating at 4.6 μm. We have fabricated a quantum cascade laser with integrated polarization mode converter that emits light of ...
Dhirhe, D. +4 more
core +2 more sources
Nonlinear response of quantum cascade structures [PDF]
, 2012 The gain spectrum of a terahertz quantum cascade laser is analysed by a non equilibrium Green's functions approach. Higher harmonics of the response function were retrievable, providing a way to approach nonlinear phenomena in quantum cascade lasers ...
Andreas Wacker +3 more
core +3 more sources