High Resolution Spectroscopy
High Resolution Spectroscopy - Related Videos
10:40
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
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Cited by 2 •
2016
The manuscript describes a method of phonon-assisted quasi-resonant fluorescence spectroscopy that incorporates both laser-limited resolution and photoluminescence (PL) spectroscopy. This method utilizes optical phonons to provide linewidth-limited resolution spectra of atom-like semiconductor structures in the energy domain. The method is also easily realized with a single spectrometer optical spectroscopy setup.
08:11
Infrared Spectroscopy
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2023
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA This experiment will demonstrate the use of infrared (IR) spectroscopy (also known as vibrational spectroscopy) to elucidate the identity of an unknown compound by identifying the functional group(s) present. IR spectra will be obtained on an IR spectrometer using the attenuated total reflection (ATR) sampling technique with a neat sample of the unknown.
09:21
Mössbauer Spectroscopy
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2023
Source: Joshua Wofford, Tamara M. Powers, Department of Chemistry, Texas A&M University Mössbauer spectroscopy is a bulk characterization technique that examines the nuclear excitation of an atom by gamma rays in the solid state. The resulting Mössbauer spectrum provides information about the oxidation state, spin state, and electronic environment around the target atom, which, in combination, gives evidence about the electronic structure and ligand arrangement (geometry) of the molecule.
09:20
X-ray Photoelectron Spectroscopy
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2023
Source: Faisal Alamgir, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA X-ray photoelectron spectroscopy (XPS) is a technique that measures the elemental composition, empirical formula, chemical state and electronic state of the elements that exist within a material. XPS spectra are obtained by irradiating a material with a beam of X-rays while simultaneously measuring the kinetic energy and number of electrons that escape from the top several...
09:26
Raman Spectroscopy for Chemical Analysis
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2023
Source: Laboratory of Dr. Ryoichi Ishihara — Delft University of Technology Raman spectroscopy is a technique for analyzing vibrational and other low frequency modes in a system. In chemistry it is used to identify molecules by their Raman fingerprint. In solid-state physics it is used to characterize materials, and more specifically to investigate their crystal structure or crystallinity. Compared to other techniques for investigating the crystal structure (e.g. transmission electron...
FAQs
Resolving power determines whether closely spaced wavelengths or frequencies appear as separate spectral features rather than as one blended signal. Greater separation capability can reveal fine structure associated with atomic, molecular, or material behavior. In engineering measurements, this detail improves the ability to identify chemical components and evaluate temperature, concentration, or material-related changes from spectral data.
Doppler and pressure broadening spread spectral features, making nearby wavelengths or frequencies harder to distinguish. Their influence can reduce the apparent precision of a measurement even when the instrument itself has high resolving power. Controlling or accounting for these effects helps preserve interpretable spectral detail during diagnostics of combustion, plasmas, gases, and other engineered systems.
These approaches provide different ways to obtain precise spectral information. Diffraction gratings separate components spatially, narrow-linewidth lasers supply highly selective radiation, and interferometers use interference-based measurements to distinguish spectral features. The appropriate approach depends on the measurement objective and required precision, while instrument stability and calibration remain important for reliable comparisons among results.
A reliable measurement requires attention to instrument stability and calibration in addition to the selected spectroscopic approach. The system must preserve the precision needed to separate nearby spectral features, while the measurement conditions should account for broadening from Doppler or pressure effects. These controls help ensure that observed spectral details reflect the sample or process rather than avoidable instrumental variation.
Engineers apply the technique when fine spectral details can provide chemical or physical information about a system. Reported uses include chemical identification, temperature and concentration analysis, plasma and combustion diagnostics, semiconductor characterization, and environmental monitoring. These applications connect spectral measurements with process conditions, material behavior, or environmental changes that may be difficult to assess through less detailed observations.
The measurements can generate spectral precision that supports model validation, process optimization, and development of more sensitive sensing systems. By resolving fine details, engineers can compare observed atomic, molecular, or material behavior with predictions and track changes in operating conditions. This makes the technique useful not only for detection, but also for improving engineered processes and measurement capabilities.