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   Articles with "cascade laser" as a keyword



Field distribution in waveguide of mid-infrared strain-compensated InAlAs/InGaAs/InP quantum cascade laser

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recommendations! Published in 2017 at "Optical and Quantum Electronics"

DOI: 10.1007/s11082-017-0894-x

Abstract: In this paper we present calculated mode distributions in double-trench mesa waveguide of a quantum cascade laser (QCL) and far-field distributions of the QCL beam—both calculated and experimental. We have computed electric field distribution in… read more here.

Keywords: field; distribution; field distribution; cascade laser ... See more keywords

3.5 THz quantum-cascade laser emission from dual diagonal feedhorns

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recommendations! Published in 2019 at "International Journal of Microwave and Wireless Technologies"

DOI: 10.1017/s175907871900028x

Abstract: Abstract Antenna-pattern measurements obtained from a double-metal supra-terahertz-frequency (supra-THz) quantum cascade laser (QCL) are presented. The QCL is mounted within a mechanically micro-machined waveguide cavity containing dual diagonal feedhorns. Operating in continuous-wave mode at 3.5… read more here.

Keywords: thz quantum; supra thz; quantum cascade; dual diagonal ... See more keywords

Quantum Cascade Laser-Based Vibrational Circular Dichroism Augmented by a Balanced Detection Scheme

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recommendations! Published in 2022 at "Analytical Chemistry"

DOI: 10.1021/acs.analchem.2c01269

Abstract: Vibrational circular dichroism (VCD) constitutes a powerful technique, enabling the determination of the absolute configuration of molecules without the need for specialized reagents. While delivering critical information, VCD signals commonly are several orders of magnitude… read more here.

Keywords: quantum cascade; vibrational circular; cascade laser; balanced detection ... See more keywords

Application of Quantum Cascade Laser-Infrared Spectroscopy and Chemometrics for In-Line Discrimination of Coeluting Proteins from Preparative Size Exclusion Chromatography

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recommendations! Published in 2022 at "Analytical Chemistry"

DOI: 10.1021/acs.analchem.2c01542

Abstract: An external-cavity quantum cascade laser (EC-QCL)-based flow-through mid-infrared (IR) spectrometer was placed in line with a preparative size exclusion chromatography system to demonstrate real-time analysis of protein elutions with strongly overlapping chromatographic peaks. Two different… read more here.

Keywords: quantum cascade; preparative size; spectroscopy; cascade laser ... See more keywords

Quantum Cascade Laser Spectral Histopathology: Breast Cancer Diagnostics Using High Throughput Chemical Imaging.

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recommendations! Published in 2017 at "Analytical chemistry"

DOI: 10.1021/acs.analchem.7b00426

Abstract: Fourier transform infrared (FT-IR) microscopy coupled with machine learning approaches has been demonstrated to be a powerful technique for identifying abnormalities in human tissue. The ability to objectively identify the prediseased state and diagnose cancer… read more here.

Keywords: microscopy; histopathology; breast cancer; cancer ... See more keywords

Coherent injection locking of quantum cascade laser frequency combs

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recommendations! Published in 2018 at "Nature Photonics"

DOI: 10.1038/s41566-018-0320-3

Abstract: Quantum cascade laser (QCL) frequency combs are a promising candidate for chemical sensing and biomedical diagnostics1–4. They are electrically pumped and compact, making them an ideal platform for on-chip integration5. Until now, optical feedback is… read more here.

Keywords: injection locking; frequency; frequency combs; injection ... See more keywords

30 years of the quantum cascade laser

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recommendations! Published in 2024 at "Communications Physics"

DOI: 10.1038/s42005-024-01888-z

Abstract: It was January 1994, when the first quantum cascade laser (QCL) displayed laser action in Bell Laboratories. During these 30 years the QCL evolved incessantly, from a lab curiosity to the main on-chip source of… read more here.

Keywords: cascade laser; quantum cascade; years quantum; physics ... See more keywords
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Broadening mechanisms and self-consistent gain calculations for GaN quantum cascade laser structures

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recommendations! Published in 2018 at "Applied Physics Letters"

DOI: 10.1063/1.5029520

Abstract: Carrier transport in GaN terahertz (THz) quantum cascade laser (QCL) structures is theoretically investigated using a non-equilibrium Green's function method. Although scattering due to polar optical phonons in GaN is greatly enhanced with respect to… read more here.

Keywords: gain; thz; broadening mechanisms; cascade laser ... See more keywords

Linewidth broadening factor of an interband cascade laser

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recommendations! Published in 2019 at "Applied Physics Letters"

DOI: 10.1063/1.5123005

Abstract: This work reports the linewidth broadening factor (LBF) of a continuous-wave interband cascade laser operated both below and above threshold. Using the Hakki-Paoli method, the below-threshold LBFs around the gain peak are determined to be… read more here.

Keywords: linewidth broadening; cascade laser; interband cascade; broadening factor ... See more keywords

Enhancing quantum cascade laser active region design through inverse neural networks: A machine learning approach to metric-based structure generation

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recommendations! Published in 2024 at "AIP Advances"

DOI: 10.1063/5.0227270

Abstract: In this study, we introduce an automated design method for Quantum Cascade Laser (QCL) active region (AR) structure employing a generative neural network, termed an inverse network, which creates the structure designs based on specific… read more here.

Keywords: structure; level; cascade laser; network ... See more keywords

Orthonormal and periodic levels for quantum cascade laser simulation

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recommendations! Published in 2024 at "Journal of Applied Physics"

DOI: 10.1063/5.0228751

Abstract: A Python package to evaluate Wannier, Wannier–Stark, and EZ (both energy and location Z resolved) levels for quantum cascade lasers is presented. We provide the underlying theory in detail with a focus on the orthonormality… read more here.

Keywords: periodic levels; levels quantum; orthonormal periodic; cascade laser ... See more keywords