Fast, spatially resolved thermometry of Si and GaP crystals using pump-probe two-photon absorption

2009 ◽  
Vol 106 (1) ◽  
pp. 013102 ◽  
Author(s):  
Chang-Ki Min ◽  
Ji Yong Park ◽  
David G. Cahill ◽  
Steve Granick
Keyword(s):  
Photon Absorption ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Spatially Resolved

Ultrafast pump-probe and time-resolved fluorescence anisotropy study of the intramolecular interaction of branched styryl derivatives based on 1,3,5-triazine

2019 ◽  
Vol 28 (01) ◽  
pp. 1950003 ◽  
Author(s):  
Yaochuan Wang ◽  
Yizhuo Wang ◽  
Guiqiu Wang ◽  
Dajun Liu
Keyword(s):  
Fluorescence Anisotropy ◽  
Intramolecular Interaction ◽  
Intramolecular Interactions ◽  
Photon Absorption ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Property Measurement

A series of branched styryl derivatives based on 1,3,5-triazine were studied by nonlinear optical property measurement, degenerated pump-probe, and time-resolved fluorescence anisotropy methods to elucidate the two-photon absorption (TPA) properties and intramolecular interactions between branches. Significant enhancement of the TPA cross-section was observed in multi-branched derivatives. The anisotropy of multi-branched compounds shows faster decay and small residual values, indicating strong intramolecular interactions between branches, which further confirmed the TPA enhancement mechanism.

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.

Pulsewidth dependence of time‐resolved two‐photon absorption with picosecond pump–probe excitation

1992 ◽  
Vol 71 (5) ◽  
pp. 2102-2105 ◽  
Author(s):  
Yasuo Tomita ◽  
Masa‐aki Shibata ◽  
Johan Bergquist
Keyword(s):  
Photon Absorption ◽  
Time Resolved ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals Investigation of Femtosecond IR Radiation Two-Photon Absorption by Pump-Probe Method in GaAs (001) Plate Reflection

2019 ◽  
Vol 14 (4) ◽  
pp. 82-90
Author(s):  
N. N. Rubtsova ◽  
G. M. Borisov ◽  
D. V. Ledovskikh
Keyword(s):  
Quantum Wells ◽  
Average Power ◽  
Photon Absorption ◽  
Ir Radiation ◽  
Central Wavelength ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Femtosecond Radiation ◽  
Kinetics Of

The reflection of probe infrared femtosecond radiation pulses from a gallium arsenide substrate of the (001) orientation in the presence of more powerful pump pulses of the same radiation with a peak power of up to 1 GW/cm2 was investigated. A Yb3+:KY(WO4)2 laser with a central wavelength of 1 035 nm, a repetition rate of 70 MHz, a pulse duration of 130 fs, and an average power of not more than 0.9 W worked in the GaAs transparency region. The experimental dependence of the recorded signal on the pump radiation intensity is in qualitative agreement with the model dependence for two-photon absorption. The results are important for the correct interpretation of reflectivity kinetics of quantum wells.

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.

On the use of two-photon absorption for determination of femtosecond pump–probe cross-correlation functions

2001 ◽  
Vol 335 (3-4) ◽  
pp. 201-208 ◽  
Author(s):  
Marcus Rasmusson ◽  
Alexander N. Tarnovsky ◽  
Eva Åkesson ◽  
Villy Sundström
Keyword(s):  
Correlation Functions ◽  
Cross Correlation ◽  
Photon Absorption ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon

Strong two-photon absorption properties and ultrafast pump-probe studies of novel porphyrin derivatives

2014 ◽  
Vol 610-611 ◽  
pp. 310-315 ◽  
Author(s):  
Debasis Swain ◽  
Anup Rana ◽  
Pradeepta K. Panda ◽  
S. Venugopal Rao
Keyword(s):  
Photon Absorption ◽  
Absorption Properties ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Porphyrin Derivatives

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.

Sign in / Sign up

Export Citation Format

Share Document