Two dimensional magnetic and optical spectra contain information about structure and dynamics inaccessible to the linear spectroscopist. Recently, phase cycling techniques in optical spectroscopy have extended the capabilities of two-dimensional electronic spectroscopy. Here, we present a method to generate collinear pump/probe pulses at high update rates for two-dimensional electronic spectroscopy. Both fluorescence mode and transmission mode photon echo data from rubidium vapor is presented.
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http://dx.doi.org/10.1364/opex.13.003697 | DOI Listing |
Nat Commun
January 2025
School of Physics and Astronomy, University of Nottingham, Nottingham, UK.
Ferroelectrics based on van der Waals semiconductors represent an emergent class of materials for disruptive technologies ranging from neuromorphic computing to low-power electronics. However, many theoretical predictions of their electronic properties have yet to be confirmed experimentally and exploited. Here, we use nanoscale angle-resolved photoemission electron spectroscopy and optical transmission in high magnetic fields to reveal the electronic band structure of the van der Waals ferroelectric indium selenide (α-InSe).
View Article and Find Full Text PDFNat Mater
January 2025
Department of Physics, Harvard University, Cambridge, MA, USA.
Atomically thin van der Waals (vdW) films provide a material platform for the epitaxial growth of quantum heterostructures. However, unlike the remote epitaxial growth of three-dimensional bulk crystals, the growth of two-dimensional material heterostructures across atomic layers has been limited due to the weak vdW interaction. Here we report the double-sided epitaxy of vdW layered materials through atomic membranes.
View Article and Find Full Text PDFSci Rep
January 2025
College of Mechanical and Transportation Engineering, Southwest Forestry University, Kunming, 650224, China.
The current piston material, Al-12Si, lacks sufficient passivation in the acidic lubrication system of biodiesel engines, making it prone to corrosion in the presence of Cl. Fe amorphous particles exhibit good compatibility with Al-12Si, possessing strong corrosion resistance, excellent passivation ability, and good high-temperature stability. They are a potential reinforcement for enhancing the Al-12Si piston material.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
January 2025
Department of Chemistry, University of Kurdistan, Sanandaj 66177-15175 Iran; Research Center for Nanotechnology, University of Kurdistan, Sanandaj 66177-15175 Iran. Electronic address:
The study focuses on the synthesis of VO microcubes for the non-enzymatic colorimetric determination of HO.Vanadium oxide nanostructures are known for their redox activity and layered structures, making VO a valuable material for sensing applications. The characterization of the prepared sample was done using XPS, XRD, Raman spectroscopy, and SEM techniques.
View Article and Find Full Text PDFLangmuir
January 2025
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
Herein, first, MIL-125 samples were synthesized via a hydrothermal method. Then, Ag species were doping on the surface of MIL-125 samples via the photolysis of silver nitrate. Finally, the Z-scheme MIL-125/Ag/BiOBr composite was synthesized via a directed liquid assembly method.
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