scholarly journals Coupled valence carrier and core-exciton dynamics in WS2 probed by few-femtosecond extreme ultraviolet transient absorption spectroscopy

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Hung-Tzu Chang ◽  
Alexander Guggenmos ◽  
Christopher T. Chen ◽  
Juwon Oh ◽  
Romain Géneaux ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Transient Absorption Spectroscopy ◽  
Exciton Dynamics

scholarly journals Exciton dynamics in DNA oligomers studied by broadband deep-UV transient absorption spectroscopy

2019 ◽  
Vol 205 ◽  
pp. 10006
Author(s):  
Benjamin Bauer ◽  
Malte Oppermann ◽  
Majed Chergui
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Base Stacking ◽  
Dna Oligomers ◽  
Exciton Dynamics ◽  
Deep Uv ◽  
Strand Length ◽  
Absorption Measurements

We report broadband transient absorption measurements of adenine strands in the deep-UV (250-370 nm). By varying the strand length we resolve the interplay between inter-base stacking and exciton formation and dynamics in DNA oligomers.

scholarly journals Symmetry of molecular Rydberg states revealed by XUV transient absorption spectroscopy

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Peng Peng ◽  
Claude Marceau ◽  
Marius Hervé ◽  
P. B. Corkum ◽  
A. Yu. Naumov ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Rydberg States ◽  
Transient Absorption Spectroscopy ◽  
Electronic Transitions ◽  
Final States ◽  
Polarization Direction ◽  
Quasibound State

AbstractTransient absorption spectroscopy is utilized extensively for measurements of bound- and quasibound-state dynamics of atoms and molecules. The extension of this technique into the extreme ultraviolet (XUV) region with attosecond pulses has the potential to attain unprecedented time resolution. Here we apply this technique to aligned-in-space molecules. The XUV pulses are much shorter than the time during which the molecules remain aligned, typically $$<$$<100 fs. However, transient absorption is not an instantaneous probe, because long-lived coherences re-emit for picoseconds to nanoseconds. Due to dephasing of the rotational wavepacket, it is not clear if these coherences will be evident in the absorption spectrum, and whether the properties of the initial excitations will be preserved. We studied Rydberg states of N$${}_{2}$$2 and O$${}_{2}$$2 from 12 to 23 eV. We were able to determine the polarization direction of the electronic transitions, and hence identify the symmetry of the final states.

scholarly journals Tracking dissociation dynamics of strong-field ionized 1,2-dibromoethane with femtosecond XUV transient absorption spectroscopy

2016 ◽  
Vol 18 (21) ◽  
pp. 14644-14653 ◽  
Author(s):  
Adam S. Chatterley ◽  
Florian Lackner ◽  
Daniel M. Neumark ◽  
Stephen R. Leone ◽  
Oliver Gessner
Keyword(s):  
Absorption Spectroscopy ◽  
Near Infrared ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Strong Field ◽  
Transient Absorption Spectroscopy ◽  
Time Resolved ◽  
Strong Field Ionization ◽  
Dissociation Dynamics ◽  
Ultraviolet Absorption Spectroscopy

Using femtosecond time-resolved extreme ultraviolet absorption spectroscopy, the dissociation dynamics of the haloalkane 1,2-dibromoethane (DBE) have been explored following strong field ionization by femtosecond near infrared pulses at intensities between 7.5 × 1013 and 2.2 × 1014 W cm−2.

Investigating the dynamics of excitons in monolayer WSe2 before and after organic super acid treatment

Nanoscale ◽  
2018 ◽  
Vol 10 (19) ◽  
pp. 9346-9352 ◽  
Author(s):  
Xin Chen ◽  
Zhuo Wang ◽  
Lei Wang ◽  
Hai-Yu Wang ◽  
Yuan-Yuan Yue ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Acid Treatment ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Exciton Dynamics ◽  
Before And After ◽  
Super Acid

Exciton dynamics of monolayer WSe2 before and after organic super acid treatment investigated by broadband transient absorption spectroscopy.

Unveiling the dimension-dependence of femtosecond nonlinear optical properties of tellurium nanostructures

2021 ◽  
Author(s):  
Qi Xiao ◽  
Bo Ma ◽  
Xian Fei ◽  
Duan-Wu Liu ◽  
Xin-Ping Zhai ◽  
...  
Keyword(s):  
Optical Properties ◽  
Absorption Spectroscopy ◽  
Nonlinear Optical ◽  
Transient Absorption ◽  
Nonlinear Optical Properties ◽  
Transient Absorption Spectroscopy ◽  
Exciton Dynamics ◽  
Ultrafast Transient Absorption ◽  
First Time ◽  
Ultrafast Transient Absorption Spectroscopy

For the first time, strong dimension-dependent femtosecond nonlinear optical properties were demonstrated in a variety of Te nanostructures. Ultrafast transient absorption spectroscopy revealed the dimension-dependent exciton dynamics.

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