Ultrafast modulation of electronic structure by coherent phonon excitations

Coherent optical control of electronic excitations in functionalized semiconductor nanostructures

The feasibility of creating and manipulating coherent quantum states on surfaces of functionalized semiconductor nanostructures is computationally investigated. Quantum dynamics simulations of electron-hole transfer between catechol molecules adsorbed on TiO2 -anatase nanostructures under cryogenic and vacuum conditions indicate that laser induced coherent excitations can be prepared and manipu...

Ultrafast all-optical switching via coherent modulation of metamaterial absorption

ice: Surface structure and electronic excitations

We present a study of the electron-stimulated desorption of deuterium cations ~D ) from thin ~1–40 ML! D 2O ice films vapor deposited on a Pt~111! substrate. Measurements of the total yield and velocity distributions as a function of temperature from 90 to 200 K show that the D yield changes with film thickness, surface temperature, and ice phase. We observe two energy thresholds for cation emi...

Ultrafast vibrational frequency shifts induced by electronic excitations: naphthols in low dielectric media.

We study the solvent-induced frequency shifts of the OH-stretching mode of 1-naphthol and 2-naphthol in nonpolar/weakly polar solvents, subject to electronic excitation, with ultrafast UV/mid-infrared pump-probe spectroscopy and theoretical modeling based on Pullin's perturbative treatment of vibrational solvatochromic effects. The model is parametrized at the density functional theory (DFT) le...

Ultrafast Modulation of the Chemical Potential in BaFe2As2 by Coherent Phonons

L. X. Yang, G. Rohde, T. Rohwer, A. Stange, K. Hanff, C. Sohrt, L. Rettig, R. Cortés, F. Chen, D. L. Feng, T. Wolf, B. Kamble, I. Eremin, T. Popmintchev, M.M. Murnane, H. C. Kapteyn, L. Kipp, J. Fink, M. Bauer, U. Bovensiepen, and K. Rossnagel Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D–24098 Kiel, Germany Fakultät für Physik, Universität Duisbu...