Excitation Energy Dependence of the S1 and ICT State Dynamics in Marine Carotenoids Studied by Femtosecond One- and Two-Photon Pump-Probe Spectroscopy

2010 ◽  
Author(s):  
D. Kosumi ◽  
S. Maruta ◽  
T. Kusumoto ◽  
R. Fujii ◽  
M. Sugisaki ◽  
...  
Keyword(s):  
Excitation Energy ◽  
Energy Dependence ◽  
Pump Probe ◽  
Two Photon ◽  
Probe Spectroscopy

Enhancement of two photon absorption properties and intersystem crossing by charge transfer in pentaaryl boron-dipyrromethene (BODIPY) derivatives

2016 ◽  
Vol 18 (19) ◽  
pp. 13546-13553 ◽  
Author(s):  
B. Küçüköz ◽  
G. Sevinç ◽  
E. Yildiz ◽  
A. Karatay ◽  
F. Zhong ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Photon Absorption ◽  
Intersystem Crossing ◽  
Absorption Properties ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Boron Dipyrromethene ◽  
Probe Spectroscopy

Indication of charge transfer and an intersystem crossing mechanism for the B4 compound by using ultrafast pump probe spectroscopy.

One-Photon and Two-Photon Pump-Probe Spectroscopy of Photoactive Yellow Protein

1997 ◽  
Vol 06 (03) ◽  
pp. 295-304
Author(s):  
O. Lyngnes ◽  
H. M. Gibbs ◽  
C. F. Li ◽  
S. B. Devanathan ◽  
T. E. Meyer ◽  
...  
Keyword(s):  
Argon Laser ◽  
Absorption Peak ◽  
Photon Absorption ◽  
Photoactive Yellow Protein ◽  
Optical Pump ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photon Excitation ◽  
Probe Spectroscopy

We present the results of nonlinear optical pump-probe experiments on photoactive yellow protein (PYP). We are able to completely bleach the 446 nm absorption peak of PYP by one-photon excitation using a cw argon laser. We calculate the corresponding index change and find it to be similar to that of bacteriorhodopsin. We also determine an upper limit to the two photon absorption cross-section of PYP by looking for bleaching of the 446 nm absorption peak under irradiation by femtosecond pulses at 820–910 nm. No TPA signal is observed.

Ultrafast relaxation kinetics of the dark S1 state in all-trans-β-carotene explored by one- and two-photon pump–probe spectroscopy

2010 ◽  
Vol 373 (1-2) ◽  
pp. 33-37 ◽  
Author(s):  
Daisuke Kosumi ◽  
Kenta Abe ◽  
Hiroshi Karasawa ◽  
Masazumi Fujiwara ◽  
Richard J. Cogdell ◽  
...  
Keyword(s):  
Relaxation Kinetics ◽  
Pump Probe ◽  
Two Photon ◽  
Ultrafast Relaxation ◽  
Probe Spectroscopy ◽  
Kinetics Of ◽  
Β Carotene

Low-Temperature Transient Optical Spectroscopy of Polydiacetylene DCHD: Evidence for a Distribution of Side Group Orientations

1995 ◽  
Vol 49 (3) ◽  
pp. 374-378 ◽  
Author(s):  
S. A. Hambir ◽  
G. J. Blanchard ◽  
G. L. Baker
Keyword(s):  
Low Temperature ◽  
Excitation Energy ◽  
Energy Dependence ◽  
Energy Barrier ◽  
Excitation Transfer ◽  
Population Recovery ◽  
Side Group ◽  
Polymer Backbone ◽  
Pump Probe ◽  
Multiple Conformers

We report on the transient optical response of the polydiacetylene DCHD at low temperature. Ultrafast pump-probe spectroscopic measurements reveal that excitation of the polymer N-methyl carbazolyl side group results in instantaneous (<10 ps) excitation transfer to the polymer backbone at 10 K. The slow population recovery signal seen subsequent to excitation transfer to the polymer backbone exhibits an excitation energy dependence that is indicative of the existence of multiple conformers. The energy barrier between these conformers is inferred to be <0.5 kcal/mol.

Ultrafast S1 and ICT state dynamics of a marine carotenoid probed by femtosecond one- and two-photon pump-probe spectroscopy

2011 ◽  
Vol 131 (3) ◽  
pp. 515-518 ◽  
Author(s):  
Daisuke Kosumi ◽  
Toshiyuki Kusumoto ◽  
Ritsuko Fujii ◽  
Mitsuru Sugisaki ◽  
Yoshiro Iinuma ◽  
...  
Keyword(s):  
Pump Probe ◽  
Two Photon ◽  
Probe Spectroscopy

scholarly journals Excitation-energy dependence of the mechanism for two-photon ionization of liquid H2O and D2O from 8.3to12.4eV

2006 ◽  
Vol 125 (4) ◽  
pp. 044515 ◽  
Author(s):  
Christopher G. Elles ◽  
Askat E. Jailaubekov ◽  
Robert A. Crowell ◽  
Stephen E. Bradforth
Keyword(s):  
Excitation Energy ◽  
Energy Dependence ◽  
Two Photon ◽  
Photon Ionization

Two photon absorption properties of four coordinated transition metal complexes of tetraarylazadipyrromethene compounds

2016 ◽  
Vol 18 (6) ◽  
pp. 4451-4459 ◽  
Author(s):  
E. Akhüseyin ◽  
O. Türkmen ◽  
B. Küçüköz ◽  
H. Yılmaz ◽  
A. Karatay ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transition Metal ◽  
Dft Calculations ◽  
Transition Metal Complexes ◽  
Photon Absorption ◽  
Absorption Properties ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Probe Spectroscopy

The effects of metals and substituents on the charge transfer mechanism and TPA properties of tetraarylazadipyrromethene compounds were investigated by ultrafast pump–probe spectroscopy, OA Z-scan experiments and DFT calculations.

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