Timescales of excited state relaxation in α−RuCl3 observed by time-resolved two-photon photoemission spectroscopy

2021 ◽  
Vol 103 (24) ◽  
Author(s):  
Dan Nevola ◽  
Alexander Bataller ◽  
Ankit Kumar ◽  
Samanvitha Sridhar ◽  
Jordan Frick ◽  
...  
Keyword(s):  
Excited State ◽  
Photoemission Spectroscopy ◽  
Time Resolved ◽  
Two Photon

scholarly journals Ultrafast processes triggered by one- and two-photon excitation of a photochromic and luminescent hydrazone

2019 ◽  
Vol 15 ◽  
pp. 2438-2446 ◽  
Author(s):  
Alessandro Iagatti ◽  
Baihao Shao ◽  
Alberto Credi ◽  
Barbara Ventura ◽  
Ivan Aprahamian ◽  
...  
Keyword(s):  
Excited State ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Transient Absorption ◽  
Solvent Polarity ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Time Resolved ◽  
Two Photon Absorption ◽  
Two Photon

In this work we apply a combination of steady state and time resolved luminescence and absorption spectroscopies to investigate the excited-state dynamics of a recently developed molecular photoswitch, belonging to the hydrazone family. The outstanding properties of this molecule, involving fluorescence toggling, bistability, high isomerization quantum yield and non-negligible two-photon absorption cross section, make it very promising for numerous applications. Here we show that the light induced Z/E isomerization occurs on a fast <1 ps timescale in both toluene and acetonitrile, while the excited state lifetime of the Z-form depends on solvent polarity, suggesting a partial charge transfer nature of its low lying excited state. Time-resolved luminescence measurements evidence the presence of a main emission component in the 500–520 nm spectral range, attributed to the Z-isomer, and a very short living blue-shifted emission, attributed to the E-isomer. Finally, transient absorption measurements performed upon far-red excitation are employed as an alternative method to determine the two-photon absorption cross-section of the molecule.

Probing of an Adsorbate-Specific Excited State on an Organic Insulating Surface by Two-Photon Photoemission Spectroscopy

2014 ◽  
Vol 136 (5) ◽  
pp. 1825-1831 ◽  
Author(s):  
Masahiro Shibuta ◽  
Naoyuki Hirata ◽  
Toyoaki Eguchi ◽  
Atsushi Nakajima
Keyword(s):  
Excited State ◽  
Photoemission Spectroscopy ◽  
Two Photon

Time-resolved two-photon photoemission spectroscopy of semiconductor bulk states

2004 ◽  
Vol 78 (2) ◽  
pp. 247-252 ◽  
Author(s):  
S. Ramakrishna ◽  
F. Willig ◽  
A. Knorr
Keyword(s):  
Photoemission Spectroscopy ◽  
Time Resolved ◽  
Two Photon
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