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Despite the ubiquity of three-dimensional (3D) anisotropic materials, their 3D molecular alignment cannot be measured using conventional two-dimensional (2D) polarization imaging. Here, we present images of the 3D angles of molecular orientations with
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
Nicholas Tostanoski, Edwin J. Heilweil, Peter Wachtel, David Musgraves, S. K. Sundaram
We report structure-terahertz property relationship for various non-oxide chalcogenide glasses including unary (vitreous selenium (Se)), binary (arsenic sulfide (As-S), arsenic selenide (As-Se), and germanium selenide (Ge-Se)), and ternary (germanium
Photothermal induced resonance (PTIR), an atomic force microscopy (AFM) analogue of IR spectroscopy capable of nanoscale lateral resolution, finds broad applications in biology and materials science. Here, the spectral range of a top-illumination PTIR
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
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
Joseph Fowler, Luis Miaja Avila, Galen O'Neil, Joel Ullom, Hope Whitelock, Daniel Swetz
We have previously used an array of cryogenic microcalorimeters with 4 eV energy resolution to measure emission-line profiles and energies for the characteristic L-shell x rays of four elements of the lanthanide series: praseodymium, neodymium, terbium
Kenneth Myers, Patrick Lenahan, James Ashton, Jason Ryan
Electrically detected magnetic resonance (EDMR) is arguably the most sensitive method available to study electrically active point defects in semiconductor devices. Most EDMR studies have utilized spin dependent recombination current and thus require p-n
Joseph Fowler, Bradley Alpert, Galen O'Neil, Daniel Swetz, Joel Ullom
The nonlinear energy response of cryogenic x-ray microcalorimeters is usually corrected though an empirical calibration. Certain x-ray emission lines of known shape and calibrated energy are used to anchor a smooth function that gener- alizes the
Extended x-ray absorption fine structure (EXAFS) has evolved into an unprecedented technique for local structural determination in material, chemical, and physical problems in materials science. Just as for other experimental techniques, such as x-ray and
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
An electro-optic dual-comb system based on chirped-pulse waveforms is used to simultaneously acquire temporally magnified rapid passage signals and normal spectral line shapes from the back-transformation to the time domain. Multi-heterodyne terahertz (THz
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
Removing distortions in coherent anti-Stokes Raman scattering (CARS) spectra due to interference with the nonresonant background (NRB) is vital for quantitative analysis. Popular computational approaches, the Kramers-Kronig relation and the maximum entropy
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
Photodetectors converting light signals into detectable photocurrents are ubiquitously in use today. To improve the compactness and performance of next-generation devices and systems, low dimensional materials provide rich physics to engineering the light
The past decade saw the emergence of new temperature sensors that have the potential to disrupt a century-old measurement infrastructure based on resistance thermometry. In this review we present an overview of emerging technologies that are either in the
Infrared (IR) spectroscopy is a broadly applicable, composition sensitive analytical technique. By leveraging the high spatial resolution of atomic force microscopy (AFM), the photothermal effect, and wavelength-tunable lasers, AFM IR enables IR
In recent years, interesting materials have emerged which are only available as µm-scale flakes, and whose novel physics might be better understood through broadband microwave spectroscopy; examples include twisted bilayer graphene [1], 2D materials in
A new THz difference-frequency chirped-pulse dual-comb method based on electro-optic phase modulators (EOMs) and two near-visible continuous wave lasers is used to perform high resolution spectroscopy and to magnify the rapid passage signal response.
We present a multi-frequency DIAL system based on a fast-switching wavelength source and fiber optic amplification to acquire range-resolved dry-air CO2 concentrations over the city of Boulder, Colorado USA