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Development of a Leak Detector of Methane Based on Absorption Spectroscopy Using Diode Matrixes
Abstract—The article is devoted to the study of a methane leak detector based on absorption spectroscopy. An LED matrix with a wavelength of ~3.3 μm...
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Nanosecond time-resolved dual-comb absorption spectroscopy
Frequency combs have revolutionized the field of optical spectroscopy, enabling researchers to probe molecular systems with a multitude of accurate...
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Manifestations of the Dicke Narrowing at Fast Recording of High-Resolution Absorption Spectra Using Frequency-Tunable Lasers
AbstractThe possibility of performing quantitative absorption measurements of particle concentrations using frequency-tunable lasers is investigated....
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Surface-enhanced infrared absorption spectroscopy
When molecules are placed at the interface to metals or metal oxides, an increase in their infrared (IR) spectral intensities is observed, a...
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Uncertainty quantification for high-temperature gas sensing using direct laser absorption spectroscopy
We performed a detailed numerical uncertainty quantification of the fixed- and scanned-wavelength direct absorption spectroscopy method (DA) at high...
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Luminosity dependent cyclotron line in Swift J1626.6−5156
We studied the timing and spectral properties of the Be/X-ray pulsar Swift J1626.6−5156 using the NICER observations of its 2021 outburst. The most...
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Two-step absorption instead of two-photon absorption in 3D nanoprinting
The quadratic optical nonlinearity arising from two-photon absorption provides the crucial spatial concentration of optical excitation in...
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Full-Wave 2D Modeling of Helicons Propagation and Absorption in the Spherical Tokamak Globus-M2
AbstractNumerical modeling of propagation and absorption of fast waves (helicons) with frequency 200 MHz in 2D inhomogeneous plasma of the spherical...
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Graphene-based hybrid plasmonic optical electro-absorption modulator on InP platform
This paper presents a novel design of an optical electro-absorption modulator based on a hybrid plasmonic structure with a graphene layer on the...
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Characteristics of the Analytical Resonator of a Weak Absorption Spectrometer
The characteristics of a weak absorption spectrometer consisting of a frequency-tunable diode laser and an external analytical resonator are...
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Absorption, Emission, and Vacuum Fluctuations
In the literature one finds several conflicting accounts of the phase difference of stimulated and spontaneous emission, as well as absorption, with...
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Sunlight as a Driver of Abiogenesis: The Quantum Mechanics of the Absorption of Light by Biomolecules
The physical basis of life is founded on the ability of living systems to harvest energy from their environment. In order for self-assembly to...
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Separation Method for Cross-Aliased Near-IR Absorption Lines of C2H4: A Coal Spontaneous Combustion Marker
To tackle the cross-interference problem between CH 4 and C 2 H 4 and the aliasing interference problem of C 2 H 4 itself, on the basis of the sparse...
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Systematization of Published Scientific Graphics Characterizing the Water Vapor Continuum Absorption: III–Publications of 2001–2020
Abstract —Graphical resources on the continuum absorption of water vapor and its mixtures published in 2011–2020 are described. Summary tables are...
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Spectral investigation of soot absorption properties during laser-induced incandescence measurements
The effect of rapid laser irradiation on the optical properties of mature soot particles is investigated by performing wavelength-resolved extinction...
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Gross Alpha Activity Measurements: Investigating the Crucial Role of Self-Absorption Correction Factors
The detection and measurement of radionuclides are indispensable processes, crucially guided by particle and photon emission mechanisms. Regulatory...
