Nonlinear absorption of light pulses under conditions of two-photon resonance in bulk crystals and nanostructures in the femtosecond pump-probe spectroscopy mode

2013 ◽  
Vol 115 (3) ◽  
pp. 435-444 ◽  
Author(s):  
E. G. Idrisov ◽  
E. Yu. Perlin
Keyword(s):  
Nonlinear Absorption ◽  
Bulk Crystals ◽  
Pump Probe ◽  
Two Photon ◽  
Light Pulses ◽  
Absorption Of Light ◽  
Probe Spectroscopy ◽  
Photon Resonance

Nonlinear absorption of femtosecond light pulses accompanying two-photon resonance in bulk crystals and nanostructures

2011 ◽  
Vol 78 (9) ◽  
pp. 563 ◽  
Author(s):  
E. Yu. Perlin ◽  
K. A. Eliseev ◽  
É. G. Idrisov ◽  
Ya. T. Khalilov
Keyword(s):  
Nonlinear Absorption ◽  
Bulk Crystals ◽  
Two Photon ◽  
Light Pulses ◽  
Photon Resonance

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.

INVESTIGATION OF NEAR TWO-PHOTON RESONANCE OPTICAL NONLINEARITIES IN Ni(Ac)2[N-(8-QUINOLYL) PYRIDINE-2-CARBOXAMIDE] · 4H2O BY THE Z-SCAN TECHNIQUE

2003 ◽  
Vol 12 (01) ◽  
pp. 81-89 ◽  
Author(s):  
SHENG-LI GUO ◽  
HUI-TIAN WANG ◽  
N. B. MING ◽  
JUN-YONG ZHANG ◽  
ZHI-JIAN GUO
Keyword(s):  
Nonlinear Absorption ◽  
Nonlinear Refraction ◽  
Photon Absorption ◽  
Closed Aperture ◽  
Optical Nonlinearities ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Nonlinear Optical Absorption ◽  
532 Nm ◽  
Photon Resonance

We describe a modified Z-scan technique for the case when nonlinear refraction is accompanied by nonlinear absorption to separately evaluate the nonlinear refraction and the nonlinear absorption by performing straightforward measurements with the aperture removed. We divide the closed aperture (S < 1) normalized Z-scan by a scan with an open aperture (S = 1). With nanosecond scale at a 532 nm wavelength, we first measured the nonlinear optical absorption and refraction coefficients of a solution of Ni(Ac)2[N-(8-quinolyl) pyridine-2-carboxamide] · 4H2O by using the modified Z-scan technique. The nonlinear absorption originates from the near resonant two-photon absorption while the mechanism of the nonlinear refraction is the near resonant two-photon absorption transition enhancement. The linear increasing dependences of the optical nonlinearities on the incident irradiance arise from the population redistribution due to the near resonant two-photon absorption.

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

PICOSECOND-INDUCED NONLINEAR ABSORPTION IN LIQUID CRYSTAL MEDIA

1995 ◽  
Vol 04 (01) ◽  
pp. 245-260 ◽  
Author(s):  
K. J. McEWAN ◽  
R. C. HOLLINS
Keyword(s):  
Experimental Data ◽  
Liquid Crystal ◽  
Excited State ◽  
Nonlinear Absorption ◽  
Excited State Absorption ◽  
Photon Absorption ◽  
Isotropic Phase ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon

The contributions to the nonlinear absorption of liquid crystal media in their isotropic phase are measured using a picosecond pump/probe technique at 587 nm. Good agreement between the experimental data and theory is obtained by assuming that two-photon absorption and excited state absorption dominate the nonlinear optical response. The important parameters are extracted from the experimental data and it is shown that the nonlinear absorption depends strongly on the molecular structure. The lifetime of the excited state is measured and found to compare well with the fluorescence lifetime.

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