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   Articles with "qcl" as a keyword



Thermal imaging of buried heterostructure quantum cascade lasers (QCLs) and QCL arrays using CCD-based thermoreflectance microscopy

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recommendations! Published in 2019 at "Journal of Applied Physics"

DOI: 10.1063/1.5065507

Abstract: Thermal profiles of a single-element quantum cascade laser (QCL) and a five-element QCL array at different bias currents, under quasi-continuous-wave (QCW) conditions, are obtained using the charge-coupled device (CCD)-based thermoreflectance imaging technique. Peak temperature changes… read more here.

Keywords: microscopy; single element; qcl; element qcl ... See more keywords

Compact and sensitive heterodyne receiver at 2.7 THz exploiting a quasi-optical HEB-QCL coupling scheme

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recommendations! Published in 2019 at "Applied Physics Letters"

DOI: 10.1063/1.5116351

Abstract: We demonstrate a sensitive and compact terahertz heterodyne detection system based on a quantum cascade laser (QCL) as a local oscillator and a hot electron bolometer (HEB) as a mixer. It relies on an original… read more here.

Keywords: heb; thz; heterodyne; qcl ... See more keywords

Fractionalization as an alternate to charge ordering in electronic insulators

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recommendations! Published in 2024 at "Physical Review B"

DOI: 10.1103/physrevb.111.235108

Abstract: Incompressible insulating phases of electronic systems at partial filling of a lattice are often associated with charge ordering that breaks lattice symmetry. The resulting phases have an enlarged unit cell with an effective integer filling.… read more here.

Keywords: qcl; qcl phases; topological order; charge ordering ... See more keywords

Impact of 3MeV Energy Proton Particles on Mid-IR QCLs

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recommendations! Published in 2023 at "Nanomaterials"

DOI: 10.3390/nano13040677

Abstract: This paper reports the results obtained for a distributed-feedback quantum cascade laser (DFB-QCL) exposed to different fluences of proton particles: 1014, 1015 and 1016 p/cm2. Dedicated laboratory setups were developed to assess the irradiation-induced changes… read more here.

Keywords: driving current; impact 3mev; proton particles; qcl ... See more keywords

Membrane-Mediated Conversion of Near-Infrared Amplitude Modulation into the Self-Mixing Signal of a Terahertz Quantum Cascade Laser

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recommendations! Published in 2025 at "Photonics"

DOI: 10.3390/photonics12030273

Abstract: A platform for converting near-infrared (NIR) laser power modulation into the self-mixing (SM) signal of a quantum cascade laser (QCL) operating at terahertz (THz) frequencies is introduced. This approach is based on laser feedback interferometry… read more here.

Keywords: qcl; modulation self; self mixing; membrane ... See more keywords