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Physics

Spectroscopy

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Displaying 101 - 125 of 911

Validation of open-path dual-comb spectroscopy against an O2 background

January 30, 2023
Author(s)
Nathan Malarich, Brian Washburn, Kevin Cossel, Fabrizio Giorgetta, Griffin Mead, Daniel Herman, Nathan R. Newbury, Ian Coddington
Dual-comb spectroscopy measures greenhouse gas concentrations over kilometer-length open-air paths with high precision. However, characterizing the absolute accuracy of these outdoor measurements is challenging, as most gas species have fluctuating

2022 Topical Meeting on Optical Interference Coatings: Manufacturing Problem Contest

January 11, 2023
Author(s)
Catherine Cooksey, Daniel Poitras, Luke Sandilands, Penghui Ma, Stacey Lee, Michael Jacobson
Participants to the 2022 Manufacturing Contest were challenged to fabricate an optical filter with a specified stepped transmittance spanning three orders of magnitude from 400 nm to 1100 nm. The problem required that contestants be equally versed in the

Interface formation and Schottky barrier height for Y, Nb, Au, and Pt on Ge as determined by hard x-ray photoelectron spectroscopy

January 6, 2023
Author(s)
Abdul Rumaiz, Ian Harding, Conan Weiland, Neha Nooman, Thomas Krings, Ethan Hull, Gabriele Giacomini, Wei Chen, Eric J. Cockayne, D. Peter Simmons, Joseph Woicik
Development of a robust, thin, hole-blocking (n+) contact on high purity germanium (HPGe) has been the main challenge in the development of Ge-based radiation sensors. Yttrium has been reported to be a viable hole-blocking contact on HPGe, and detectors

Symmetry-dependent ultrafast manipulation of nanoscale magnetic domains

December 23, 2022
Author(s)
Nanna Hagstrom, Rahul Jangid, F. N. U. Meera, Diego Turenne, Jeffrey Brock, Erik Lamb, Boyan Stoychev, Justine Schlappa, Natalia Gerasimova, Benjamin Van Kuiken, Rafael Gort, Laurent Mercadier, Loic Le Guyader, Andrey Samartsev, Andreas Scherz, Giuseppe Mercurio, Hermann Durr, Alexander Reid, Monika Arora, Hans Nembach, Justin Shaw, Emmanuelle Jal, Eric Fullerton, Mark Keller, Roopali Kukreja, Stefano Bonetti, Thomas J. Silva, Ezio Iacocca
Symmetry is a powerful concept in physics, but its applicability to far-from-equilibrium states is still being understood. Recent attention has focused on how far-from-equilibrium states lead to spontaneous symmetry breaking. Conversely, ultrafast optical

Investigating the electronic structure of high explosives with x-ray Raman spectroscopy

November 14, 2022
Author(s)
Oscar Ariel Paredes Mellone, Dimosthenis Sokaras, Trevor Willey, Michael Nielsen, John Vinson
We investigate the sensitivity and potential of a synergistic experiment-theory X-ray Raman spectroscopy (XRS) methodology on revealing and following the static and dynamic electronic structure of high explosive molecular materials. We show that advanced

Tip-enhanced Raman scattering for atomic-scale spectroscopy and imaging

October 24, 2022
Author(s)
Jeremy Schultz
Atomic scale spectroscopy provides an exceptional ability to define electronic, optical, thermal, mechanical, and chemical properties of materials at the nanoscale. At these scales, dimensional confinement can lead to new and unusual properties, where the

Tightly Confined Surface Acoustic Waves as Microwave-to-Optical Transduction Platforms in the Quantum Regime

September 26, 2022
Author(s)
Ryan DeCrescent, Zixuan Wang, Poolad Imany, Robert Boutelle, Corey McDonald, Travis Autry, John Teufel, Sae Woo Nam, Richard Mirin
Surface acoustic waves (SAWs) coupled to quantum dots (QDs), trapped atoms and ions, and point defects have been proposed as quantum transduction platforms, yet the requisite coupling rates and cavity lifetimes have not been experimentally established

Electron Paramagnetic Resonance Study of Carbonated Hydroxyapatite Synthesized through Calcium Phosphate Cements

August 5, 2022
Author(s)
Alline F. Myers, Shozo Takagi, Stanislav Frukhtbeyn, Laurence Chow, Veronika Szalai, Lonnie Cumberland, Ileana Pazos, Eaman Karim
Ionizing radiation-induced paramagnetic defects in calcified tissues like tooth enamel are indicators of irradiation dose. Hydroxyapatite (HA), the principal constituent in these materials, incorporates a variety of anions (CO32, F, Cl, SiO44 ) and

Simulation-guided resonant soft X-ray scattering for determining microstructure of triblock copolymers

August 1, 2022
Author(s)
Eliot Gann, Veronica Reynolds, Michael L. Chabinyc, Christopher Bates, Devon Callan, Elizabeth Murphy, Yan-Qiao Chen, Kaitlin Albanese, Claire Wu, Craig Hawker
Resonant soft X-ray scattering (RSoXS) probes structure with chemical sensitivity that is useful for determining the morphology of multiblock copolymers. However, the hyperspectral data produced by this technique are challenging to interpret. Here, we use

The Inner Shell Spectroscopy Beamline at NSLS-II: a facility for in situ and operando X-ray absorption spectroscopy for materials research

July 1, 2022
Author(s)
Bruce D. Ravel, Denis Leshchev, Bruno Luvizotto, Ruslan Kadyrov, Klaus Attenkofer, Eli Stavitski
Abstract The Inner Shell Spectroscopy (ISS) beamline on the 8-ID station at the National Synchrotron Light Source II (NSLS-II), Upton, NY, USA, is a high throughput X-ray Absorption Spectroscopy beamline designed for the in situ, operando, and time
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