scholarly journals Ultrafast dynamics of Mott-state quench and formation in strongly correlated BEDT-TTF molecular conductors observed by three-pulse pump probe spectroscopy

2021 ◽  
Vol 104 (11) ◽  
Author(s):  
S. Tsuchiya ◽  
H. Taniguchi ◽  
J. Yamada ◽  
Y. Toda ◽  
D. Mihailovic ◽  
...  
Keyword(s):  
Ultrafast Dynamics ◽  
Strongly Correlated ◽  
Molecular Conductors ◽  
Pump Probe ◽  
Pulse Pump ◽  
Probe Spectroscopy

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 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 Towards a spectroscopic protocol for unambiguous detection of quantum coherence in excitonic energy transport

2020 ◽  
Vol 221 ◽  
pp. 110-132 ◽  
Author(s):  
Max Marcus ◽  
George C. Knee ◽  
Animesh Datta
Keyword(s):  
Experimental Data ◽  
Quantum Coherence ◽  
Energy Transport ◽  
Pump Probe ◽  
Pulse Pump ◽  
Unambiguous Detection ◽  
Probe Spectroscopy ◽  
Excitonic Energy

We propose a witness for quantum coherence in EET that can be extracted directly from two-pulse pump–probe spectroscopy experimental data.

scholarly journals Measurement of ultrafast dynamics of photoexcited carriers inβ-Ga2O3by two-color optical pump-probe spectroscopy

2018 ◽  
Vol 113 (25) ◽  
pp. 252102 ◽  
Author(s):  
Okan Koksal ◽  
Nicholas Tanen ◽  
Debdeep Jena ◽  
Huili (Grace) Xing ◽  
Farhan Rana
Keyword(s):  
Ultrafast Dynamics ◽  
Optical Pump ◽  
Pump Probe ◽  
Probe Spectroscopy

scholarly journals Ultrafast Dynamics of the VO2Insulator-to-Metal Transition Observed by Nondegenerate Pump-Probe Spectroscopy

2013 ◽  
Vol 41 ◽  
pp. 03006
Author(s):  
N. F. Brady ◽  
K. Appavoo ◽  
M. Seo ◽  
J. Nag ◽  
R. P. Prasankumar ◽  
...  
Keyword(s):  
Ultrafast Dynamics ◽  
Pump Probe ◽  
Probe Spectroscopy

scholarly journals Observation of robust energy transfer in the photosynthetic protein allophycocyanin using single-molecule pump-probe spectroscopy

2021 ◽  
Author(s):  
Raymundo Moya ◽  
Audrey Norris ◽  
Toru Kondo ◽  
Gabriela Schlau-Cohen
Keyword(s):  
Energy Transfer ◽  
Single Molecule ◽  
Light Harvesting ◽  
Asymmetric Distribution ◽  
Ultrafast Dynamics ◽  
Pump Probe ◽  
Photosynthetic Organisms ◽  
Probe Spectroscopy ◽  
The Impact ◽  
Protein Fluctuations

Abstract Photosynthetic organisms convert sunlight to electricity with near unity quantum efficiency. Absorbed photoenergy transfers through a network of chromophores positioned within protein scaffolds, which fluctuate due to thermal motion. The resultant variation in energy transfer has not yet been measured, and so how the efficiency is robust to this variation, if any, has not been determined. Here, we describe single-molecule pump-probe spectroscopy with facile spectral tuning and its application to the ultrafast dynamics of single allophycocyanin, a light-harvesting protein from cyanobacteria. Using the spectral dependence of the dynamics, energy transfer and energetic relaxation from nuclear motion were disentangled. For energy transfer, an asymmetric distribution of timescales was observed. For energetic relaxation, the timescales were slower and more heterogeneous due to the impact of the protein environment. Collectively, these results suggest that energy transfer is robust to protein fluctuations, a prerequisite for efficient light harvesting.

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 Probing Ultrafast Dynamics of Ferroelectrics by Time‐Resolved Pump‐Probe Spectroscopy

2021 ◽  
pp. 2102488
Author(s):  
Yuan Zhang ◽  
Junfeng Dai ◽  
Xiangli Zhong ◽  
Dongwen Zhang ◽  
Gaokuo Zhong ◽  
...  
Keyword(s):  
Ultrafast Dynamics ◽  
Time Resolved ◽  
Pump Probe ◽  
Probe Spectroscopy
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