Field distribution in waveguide of mid-infrared strain-compensated InAlAs/InGaAs/InP quantum cascade laser
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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.
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
Broadening mechanisms and self-consistent gain calculations for GaN quantum cascade laser structures
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
An external-cavity quantum cascade laser operating near 5.2 µm combined with cavity ring-down spectroscopy for multi-component chemical sensing
Sign Up to like & getrecommendations! Published in 2018 at "Laser Physics"
DOI: 10.1088/1555-6611/aaaa55
Abstract: We report on the performance of a widely tunable continuous wave mode-hop-free external-cavity quantum cascade laser operating at λ ~ 5.2 µm combined with cavity ring-down spectroscopy (CRDS) technique for high-resolution molecular spectroscopy. The CRDS… read more here.
Keywords: cavity quantum; external cavity; cavity; spectroscopy ... See more keywords
Tellurite Hollow-Core Antiresonant Fiber-Coupled Quantum Cascade Laser Absorption Spectroscopy
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2021.3088140
Abstract: Mid-infrared absorption spectroscopy for gas detection is reported in this study using a quantum cascade laser (QCL) coupled with a custom-made tellurite hollow-core antiresonant fiber (HC-ARF). The HC-ARF is fabricated from tellurite glass by extrusion… read more here.
Keywords: absorption spectroscopy; spectroscopy; quantum cascade; cascade laser ... See more keywords
Quantum Transmission Line Modeling and Experimental Investigation of the Output Characteristics of a Terahertz Quantum Cascade Laser
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Terahertz Science and Technology"
DOI: 10.1109/tthz.2020.2970341
Abstract: We describe a new approach to modeling the optoelectronic properties of a terahertz-frequency quantum cascade laser (THz QCL) based on a quantum transmission line modelling (Q-TLM) method. Parallel quantum cascade transmission line modeling units are… read more here.
Keywords: quantum cascade; cascade laser; transmission; thz qcl ... See more keywords