scholarly journals Pump-probe reflectivity study of ultrafast dynamics of strongly correlated 5f electrons in UO2

2011 ◽  
Vol 273 ◽  
pp. 012144 ◽  
Author(s):  
Yong Q An ◽  
Antoinette J Taylor ◽  
Tomasz Durakiewicz ◽  
George Rodriguez
Keyword(s):  
Ultrafast Dynamics ◽  
Strongly Correlated ◽  
Pump Probe ◽  
5F Electrons

scholarly journals Dynamics of Primary Events in the Photocycle of Excited Bacteriorhodopsin

2004 ◽  
Vol 36 (11) ◽  
pp. 724-728 ◽  
Author(s):  
Jun-Jun Lu ◽  
Ming Ming ◽  
Yi Yang ◽  
Jia Wu ◽  
Bo Li ◽  
...  
Keyword(s):  
Dynamic Behavior ◽  
Time Scale ◽  
Excitation Wavelength ◽  
Ultrafast Dynamics ◽  
Medium Ph ◽  
Pump Probe ◽  
Dynamical Behaviors ◽  
Retinal Chromophore ◽  
Ph Dependent ◽  
The One

Abstract Transient dynamic behavior of the excited bacteriorhodopsin (BR), which was isolated from the strain H. salinarum, was studied at excitation wavelength from 585 to 639 nm. With the one-color femtosecond (fs) pump-probe technique, we revealed the primary events in BR's photocycle that took place in an ultrafast time scale. From the analysis of the decay components of the dynamical traces, it was evident that the isomerization of the retinal chromophore in BR and the intermediate J's formation occurred within 500 fs. BR exhibited pH-dependent dynamical behaviors. When the medium pH was between 5 and 9, the BR ultrafast dynamics has no obvious change. In contrast, the dynamical curves were obviously affected when the pH was out of that region.

Ultrafast dynamics in pentacene and tetracene probed using optical pump-probe spectroscopy

2004 ◽  
Author(s):  
Verner K. Thorsmølle ◽  
R D. Averitt ◽  
J Demsar ◽  
X Chi ◽  
S Tretiak ◽  
...  
Keyword(s):  
Ultrafast Dynamics ◽  
Optical Pump ◽  
Pump Probe ◽  
Probe Spectroscopy

scholarly journals Mapping and controlling ultrafast dynamics of highly excited H2 molecules by VUV-IR pump-probe schemes

2017 ◽  
Vol 95 (1) ◽  
Author(s):  
F. P. Sturm ◽  
X. M. Tong ◽  
A. Palacios ◽  
T. W. Wright ◽  
I. Zalyubovskaya ◽  
...  
Keyword(s):  
Ultrafast Dynamics ◽  
Pump Probe

scholarly journals Ultrafast dynamics of hydrated excess protons in CH3CN:H2O mixtures

2019 ◽  
Vol 205 ◽  
pp. 09003
Author(s):  
Fabian Dahms ◽  
Achintya Kundu ◽  
Ehud Pines ◽  
Benjamin P. Fingerhut ◽  
Erik T. J. Nibbering ◽  
...  
Keyword(s):  
Ultrafast Dynamics ◽  
Vibrational Dynamics ◽  
Pump Probe ◽  
2D Ir ◽  
Proton Potential ◽  
Hydrated Proton

In a combined experimental and theoretical 2D-IR and pump-probe study we determine how ultrafast solvent motions govern the vibrational dynamics of the hydrated proton and the key role played by the underlying proton potential.

scholarly journals Probing Ultrafast Dynamics of 5f Electrons in Crystalline UO2

2010 ◽  
Author(s):  
Y. Q. An ◽  
A. J. Taylor ◽  
T. Durakiewicz ◽  
G. Rodriguez
Keyword(s):  
Ultrafast Dynamics ◽  
5F Electrons

scholarly journals Orbital-Dependent Photodynamics of Strongly Correlated Clusters

2021 ◽  
Author(s):  
Jacob Garcia ◽  
Scott Sayres
Keyword(s):  
Theoretical Calculations ◽  
Advanced Materials ◽  
Strongly Correlated ◽  
Relaxation Dynamics ◽  
Pump Probe ◽  
Defect Sites ◽  
Atomic Precision ◽  
Bulk Scale ◽  
Probe Spectroscopy

Understanding the role of defect sites on the mechanism and lifetime of photoexcited state relaxation is critical for the ration-al design of advanced materials. Here, the ultrafast electronic relaxation dynamics of neutral nickel oxide clusters were inves-tigated with femtosecond pump-probe spectroscopy and supported with theoretical calculations to reveal that their excited state lifetimes are strongly dependent on the nature of the electronic transition. Absorption of a UV photon produces short lived (lifetime ~110 fs) dynamics in stoichiometric (NiO)n clusters (n < 6) that are attributed to a ligand to metal charge transfer (LMCT) and produces metallic-like electron-electron scattering. Oxygen vacancies introduce excitations with Ni-3d→Ni-4s and 3d→4p character, which increases the lifetimes of the sub-picosecond response by up to 80% and enables the formation of long-lived (lifetimes > 2.5 ps) states. The atomic precision and tunability of gas phase clusters are employed to highlight a unique reliance on the Ni orbital contributions to the photoexcited lifetimes, providing new insights to the anal-ogous band edge excitation dynamics of strongly correlated bulk-scale NiO materials.

scholarly journals Reconstruction of few-fs XUV pulses with a perturbative approach

2021 ◽  
Vol 255 ◽  
pp. 11008
Author(s):  
Bruno Moio ◽  
Fabio Medeghini ◽  
Gian Luca Dolso ◽  
Giacomo Inzani ◽  
Nicola Di Palo ◽  
...  
Keyword(s):  
Extreme Ultraviolet ◽  
Measurement Procedure ◽  
Ultrafast Dynamics ◽  
Perturbative Approach ◽  
Pump Probe ◽  
Physical Systems ◽  
Require Time ◽  
Perturbative Regime ◽  
Pump Probe Experiment

A precise temporal characterization of the pulses involved in pump-probe experiments is crucial for a proper investigation of the ultrafast dynamics in several physical systems. Indeed, it is required for the assessment of the dynamical properties under examination with sufficient temporal resolution. In the fewfs/attosecond domain, typical reconstruction procedures require time-consuming interative methods, which are also sensitive to the experimental noise and to the distortion of the measurement. We developed an approach, called Simplified Trace Reconstruction In the Perturbative regimE (STRIPE), which allows us for a precise characterization of the infrared (IR) and extreme ultraviolet (XUV) pulses, used in a pump-probe experiment. Our method is not based on a phase retrival algorithm, and for this it is typically much faster than the other ones currently known. Moreover, it allows for easily including in the reconstruction the experimental non-idealities that may affect the measurement, like possible distortion due to the measurement procedure itself.

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