Time-Resolved Photoelectron Spectroscopy of Dissociating 1,2-Butadiene Molecules by High Harmonic Pulses

2015 ◽  
Vol 6 (13) ◽  
pp. 2463-2468 ◽  
Author(s):  
Ryo Iikubo ◽  
Takehisa Fujiwara ◽  
Taro Sekikawa ◽  
Yu Harabuchi ◽  
Sota Satoh ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
High Harmonic ◽  
Time Resolved

Ultrafast Relaxation Dynamics in trans-1,3-Butadiene Studied by Time-Resolved Photoelectron Spectroscopy with High Harmonic Pulses

2014 ◽  
Vol 5 (10) ◽  
pp. 1760-1765 ◽  
Author(s):  
Ayumu Makida ◽  
Hironori Igarashi ◽  
Takehisa Fujiwara ◽  
Taro Sekikawa ◽  
Yu Harabuchi ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
High Harmonic ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Ultrafast Relaxation ◽  
In Trans

scholarly journals Structural dynamics of photochemical reactions probed by time-resolved photoelectron spectroscopy using high harmonic pulses

2016 ◽  
Vol 194 ◽  
pp. 147-160 ◽  
Author(s):  
Ryo Iikubo ◽  
Taro Sekikawa ◽  
Yu Harabuchi ◽  
Tetsuya Taketsugu
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ring Opening ◽  
Potential Energy Surfaces ◽  
High Harmonic ◽  
Photochemical Reactions ◽  
Photoelectron Spectra ◽  
Time Resolved ◽  
Photon Excitation ◽  
Energy Surfaces ◽  
Sigma Bond

Femtosecond ring-opening dynamics of 1,3-cyclohexadiene (CHD) in gas phase upon two-photon excitation at 400 nm (=3.1 eV) was investigated by time-resolved photoelectron spectroscopy using 42 nm (=29.5 eV) high harmonic photons probing the dynamics of the lower-lying occupied molecular orbitals (MOs), which are the fingerprints of the molecular structure. After 500 fs, the photoelectron intensity of the MO constituting the CC sigma bond (σCC) of CHD was enhanced, while that of the MO forming the C–C sigma bond (σCC) of CHD was decreased. The changes in the photoelectron spectra suggest that the ring of CHD opens to form a 1,3,5-hexatriene (HT) after 500 fs. The dynamics of the σCC and σCC bands between 200 and 500 fs reflects the ring deformation to a conical intersection between the 21A and 11A potential energy surfaces prior to the ring-opening reaction.

scholarly journals Ultrafast extreme ultraviolet photoemission without space charge

2019 ◽  
Vol 205 ◽  
pp. 02014
Author(s):  
Peng Zhao ◽  
Christopher Corder ◽  
Jin Bakalis ◽  
Xinlong Li ◽  
Matthew D. Kershis ◽  
...  
Keyword(s):  
Space Charge ◽  
Photoelectron Spectroscopy ◽  
Extreme Ultraviolet ◽  
High Harmonic ◽  
Photoelectron Spectra ◽  
Time Resolved ◽  
Record Time ◽  
Free Sample ◽  
Harmonic Source

We present photoelectron spectroscopy experiments using an 88 MHz cavityenhanced high-harmonic source operating from 8 to 40 eV. Nanoampere space-charge free sample photo currents enable us to record time-resolved photoelectron spectra from weakly excited samples.

scholarly journals Time-Resolved Photoelectron Spectroscopy of Gaseous Molecule Using Single-Order High Harmonic Pulses

2015 ◽  
Vol 43 (12) ◽  
pp. 833
Author(s):  
Taro SEKIKAWA ◽  
Ryo IIKUBO ◽  
Yu HARABUCHI ◽  
Sota SATOH ◽  
Tetsuya TAKETSUGU ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
High Harmonic ◽  
Time Resolved ◽  
Gaseous Molecule

Electronic structure dynamics in a low bandgap polymer studied by time-resolved photoelectron spectroscopy

2016 ◽  
Vol 18 (31) ◽  
pp. 21921-21929 ◽  
Author(s):  
Ute B. Cappel ◽  
Stefan Plogmaker ◽  
Joachim A. Terschlüsen ◽  
Torsten Leitner ◽  
Erik M. J. Johansson ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Harmonic Generation ◽  
Photoelectron Spectroscopy ◽  
High Harmonic ◽  
Time Of Flight ◽  
High Harmonic Generation ◽  
Time Resolved ◽  
Low Bandgap ◽  
Structure Dynamics

The excited electronic structure of PCPDTBT was measured by combining a high harmonic generation source and a time-of-flight spectrometer.

scholarly journals Ultrafast Photolysis of o-Nitrophenol Studied by Time-Resolved Photoelectron Spectroscopy

2019 ◽  
Vol 205 ◽  
pp. 09022
Author(s):  
Yuki Nitta ◽  
Oliver Schalk ◽  
Keisuke Kaneshima ◽  
Taro Sekikawa
Keyword(s):  
Real Time ◽  
Photoelectron Spectroscopy ◽  
Nitrous Acid ◽  
High Harmonic ◽  
Time Resolved

The formation of nitrous acid (HONO) through photolysis of o-nitrophenol was captured in real time by time-resolved photoelectron spectroscopy using single-order high harmonic probe pulses. HONO is released 250 fs after photoexcitation.

scholarly journals Attosecond intra-valence band dynamics and resonant-photoemission delays in W(110)

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
S. Heinrich ◽  
T. Saule ◽  
M. Högner ◽  
Y. Cui ◽  
V. S. Yakovlev ◽  
...  
Keyword(s):  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Electronic Band Structure ◽  
Photoelectric Effect ◽  
Final State ◽  
Electronic Band ◽  
Time Resolved ◽  
Resonant Photoemission ◽  
Pulse Trains ◽  
Electron Correlation Effects

AbstractTime-resolved photoelectron spectroscopy with attosecond precision provides new insights into the photoelectric effect and gives information about the timing of photoemission from different electronic states within the electronic band structure of solids. Electron transport, scattering phenomena and electron-electron correlation effects can be observed on attosecond time scales by timing photoemission from valence band states against that from core states. However, accessing intraband effects was so far particularly challenging due to the simultaneous requirements on energy, momentum and time resolution. Here we report on an experiment utilizing intracavity generated attosecond pulse trains to meet these demands at high flux and high photon energies to measure intraband delays between sp- and d-band states in the valence band photoemission from tungsten and investigate final-state effects in resonant photoemission.

Sign in / Sign up

Export Citation Format

Share Document