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Chiral charge-density wave in TiSe due to photo-induced structural distortions
Darshana Wickramaratne, Richard Schaller, Gary Wiederrecht +2
A variety of experiments have been carried out to establish the origin of the chiral charge-density wave transition in 1T-TiSe, which in turn has led to contradictory conclusio…
Extraordinarily Large Permittivity Modulation in Zinc Oxide for Dynamic Nanophotonics
Soham Saha, Aveek Dutta, Clayton DeVault +7
The dielectric permittivity of a material encapsulates the essential physics of light-matter interaction into the material's local response to optical excitation. Dynamic, photo-in…
Ultrafast dynamics in normal and Charge Density Wave phase of 2H-NbSe2
A. Anikin, R. D. Schaller, G. P. Wiederrecht +3
We investigate carrier and collective mode dynamics in 2H-NbSe using time-resolved optical pump-probe spectroscopy and compare the results with first-principle calculations. Br…
Accelerating ultrafast spectroscopy with compressive sensing
Sushovit Adhikari, Cristian L. Cortes, Xiewen Wen +5
Ultrafast spectroscopy is an important tool for studying photoinduced dynamical processes in atoms, molecules, and nanostructures. Typically, the time to perform these experiments…
Broadband Ultrafast Dynamics of Refractory Metals: TiN and ZrN
Benjamin T. Diroll, Soham Saha, Vladimir M. Shalaev +2
Transition metal nitrides have recently gained attention in the fields of plasmonics, plasmon-enhanced photocatalysis, photothermal applications, and nonlinear optics because of th…
RIXS Reveals Hidden Local Transitions of the Aqueous OH Radical
L. Kjellsson, K. Nanda, J. -E. Rubensson +23
Resonant inelastic x-ray scattering (RIXS) provides remarkable opportunities to interrogate ultrafast dynamics in liquids. Here we use RIXS to study the fundamentally and practical…