Spectroscopy is an analytical technique that measures the interaction between electromagnetic radiation (or other energetic probes, such as electrons or ions) and matter as a function of wavelength, frequency, or energy to obtain information about a system’s composition, structure, and dynamics. By monitoring absorption, emission, scattering, or reflection, spectroscopy reveals quantized energy levels associated with electronic, vibrational, and rotational states. Variants such as UV–Vis, infrared, Raman, nuclear magnetic resonance, and X-ray spectroscopy exploit distinct interaction mechanisms and selection rules, enabling determination of molecular identity, chemical environment, bonding characteristics, and in some cases spatial or temporal evolution of materials and biochemical systems.
For the first time, researchers have been able to measure the quantum state of electrons ejected from atoms that have absorbed high-energy light pulses. This is thanks to a new measurement technique developed by researchers ...
Optics & Photonics
Feb 12, 2025
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An international team of engineers and physicists have found a way to use quantum light to improve the performance of cutting-edge spectroscopy.
Optics & Photonics
Feb 3, 2025
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The physical interaction between two or more systems, also known as coupling, can give rise to unique and unexpected effects. In the field of optics, coupled light sources (e.g., lasers) can influence each other, producing ...
Ultrawide-bandgap semiconductors—such as diamond—are promising for next-generation electronics due to a larger energy gap between the valence and conduction bands, allowing them to handle higher voltages, operate at higher ...
Nanophysics
Jan 24, 2025
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For the first time ever, scientists have used a technique called "quantum squeezing" to improve the gas sensing performance of devices known as optical frequency comb lasers. These ultra-precise sensors are like fingerprint ...
Optics & Photonics
Jan 16, 2025
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An interdisciplinary research team from LMU, the Technical University of Munich (TUM), and the University of Oxford has employed novel spectroscopic techniques to investigate the diffusion of excited states in covalent organic ...
Nanophysics
Jan 10, 2025
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Researchers have finished equipping the Subaru Telescope with a new special "compound eye," culminating several years of effort. This new eye is an instrument featuring approximately 2,400 prisms scattered across the extremely ...
Astronomy
Jan 10, 2025
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Miniaturized spectroscopy systems that can detect trace concentrations at the parts-per-billion (ppb) level are of the utmost importance in applications ranging from environmental monitoring and industrial process control ...
Optics & Photonics
Dec 18, 2024
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Researchers have developed a deep learning-based approach that significantly streamlines the accurate identification and classification of two-dimensional (2D) materials through Raman spectroscopy. In comparison, traditional ...
Nanomaterials
Nov 14, 2024
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University of Liverpool researchers are part of an international research collaboration that has shed light on what happens at the extremes of neutron and proton numbers, in search of where the periodic table of chemical ...
General Physics
Nov 11, 2024
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