Time-resolved stimulated emission spectroscopy in the ultrashort domain through pump–probe experiments

2007 ◽  
Vol 254 (4) ◽  
pp. 859-862 ◽  
Author(s):  
S. Orlando ◽  
A. Paladini ◽  
L. Guidoni ◽  
A. Santagata ◽  
G.P. Parisi ◽  
...  
Keyword(s):  
Emission Spectroscopy ◽  
Stimulated Emission ◽  
Time Resolved ◽  
Pump Probe

scholarly journals Probing Local Environments by Time-Resolved Stimulated Emission Spectroscopy

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Ana Rei ◽  
Graham Hungerford ◽  
Michael Belsley ◽  
M. Isabel C. Ferreira ◽  
Peter Schellenberg
Keyword(s):  
Emission Spectroscopy ◽  
Sol Gel ◽  
Fluorescence Emission ◽  
Local Environment ◽  
Fluorescence Decay ◽  
Stimulated Emission ◽  
Binary Solvents ◽  
Time Resolved ◽  
Local Environments ◽  
Lower Viscosity

Time-resolved stimulated emission spectroscopy was employed to probe the local environment of DASPMI (4-(4-(dimethylamino)styryl)-N-methyl-pyridinium iodide) in binary solvents of different viscosity and in a sol-gel matrix. DASPMI is one of the molecules of choice to probe local environments, and the dependence of its fluorescence emission decay on viscosity has been previously used for this purpose in biological samples, solid matrices as well as in solution. The results presented in this paper show that time-resolved stimulated emission of DASPMI is a suitable means to probe the viscosity of local environments. Having the advantage of a higher time resolution, stimulated emission can provide information that is complementary to that obtained from fluorescence decay measurements, making it feasible to probe systems with lower viscosity.

Onset of optical emission in femtosecond laser-induced plasmas and its correlation with surface dynamics monitored by pump–probe time-resolved microscopy

2019 ◽  
Vol 34 (10) ◽  
pp. 2119-2125 ◽  
Author(s):  
I. Carrasco-García ◽  
José M. Vadillo ◽  
J. Javier Laserna
Keyword(s):  
Femtosecond Laser ◽  
Time Scales ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Surface Dynamics ◽  
Time Resolved ◽  
Pump Probe ◽  
Molecular Emission ◽  
Probe Microscope

Femtosecond time-resolved images acquired by using a two-color pump–probe microscope have been used in combination with optical emission spectroscopy to determine the time scales for the onset of atomic and molecular emission in laser-induced plasmas.

Spectroscopic Techniques using Synchrotron Radiation and Free-Electron and Conventional Lasers

1998 ◽  
Vol 5 (3) ◽  
pp. 293-298 ◽  
Author(s):  
A. Tadjeddine ◽  
A. Peremans ◽  
A. Le Rille ◽  
W. Q. Zheng ◽  
J. M. Ortéga ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Quantum Wells ◽  
Storage Ring ◽  
Free Electron ◽  
Difference Frequency Generation ◽  
Stimulated Emission ◽  
Vibrational Properties ◽  
Spectroscopic Techniques ◽  
Time Resolved ◽  
Pump Probe

Considerable progress in the investigation of the electronic and vibrational properties of atoms, molecules, materials, surfaces and interfaces has been achieved by combining different photon sources of complementary characteristics. In this paper some experimental results obtained recently at LURE by using two synchronized sources, such as the IR free-electron laser (FEL) CLIO, the VUV storage ring FEL, synchrotron radiation and table lasers, are presented. Using CLIO synchronized with a YAG laser allows the investigation of the vibrational properties of adsorbed species by the non-linear optical technique of visible–IR sum (difference) frequency generation, as shown for the adsorption of hydrogen on platinum in the electrochemical environment. The second result reported here relates to the study of the intersubband stimulated emission in GaAs/GaAlAs quantum wells by pump-probe experiments using the two-colour configuration of CLIO. The combination of a mode-locked Ar+ laser and synchrotron radiation has been used for investigations in a pump-probe arrangement of the ionization of Xe atoms via the resonant state Xe* 5p 55d [3/2]1. The final example is a time-resolved core-level spectroscopy study of photoexcited Si(111) 2 × 1 surfaces by using a combination of the naturally synchronized UV storage ring laser and synchrotron radiation.

Time-Resolved Spectral Measurement of Dendrimer Molecular Films with Rhodamine B Core

2001 ◽  
Vol 708 ◽  
Author(s):  
M. Zhou ◽  
A. Otomo ◽  
S. Yokoyama ◽  
S. Mashiko
Keyword(s):  
Rhodamine B ◽  
Stimulated Emission ◽  
Pump Light ◽  
Molecular Films ◽  
Fast Decay ◽  
Probe Light ◽  
Time Resolved ◽  
Pump Probe ◽  
Molecular Density ◽  
Molecular Film

ABSTRACTWe investigated molecular thin films fabricated using novel organic materials, such as dendrimers with a rhodamine B (Rh-B) core, by a pump-probe measurement for ultrafast time-resolved spectroscopy with a time resolution of approximately 160 fs. The photon energy transfer caused by the interaction of the dendrimer molecules was measured in terms of absorbance. The wavelength of the pump light was 550 nm and a white continuum light spanning from 450 nm to 750 nm was used as a probe light. A spin-coated molecular film made of dendrimer molecules with Rh-B core has a relatively high molecular density. We measured a strong stimulated emission at a wavelength of 612 nm, whose fast decay was assumed to be caused by intermolecular interactions between the dendrimer molecules with Rh-B core. The lifetime of the molecules in the excited state was measured to be as short as 10 ps. Several types of molecular films with different molecular densities were compared, and cases with different pump energies were also discussed.

Femtosecond Polarized Pump−Probe and Stimulated Emission Spectroscopy of the Isomerization Reaction of Rhodopsin

1999 ◽  
Vol 103 (14) ◽  
pp. 2202-2207 ◽  
Author(s):  
Gilad Haran ◽  
Elisabeth A. Morlino ◽  
Jens Matthes ◽  
Robert H. Callender ◽  
Robin M. Hochstrasser
Keyword(s):  
Emission Spectroscopy ◽  
Stimulated Emission ◽  
Isomerization Reaction ◽  
Pump Probe

scholarly journals Time-Resolved Polarization Imaging By Pump-Probe (Stimulated Emission) Fluorescence Microscopy

2000 ◽  
Vol 79 (1) ◽  
pp. 536-549 ◽  
Author(s):  
Ch. Buehler ◽  
C.Y. Dong ◽  
P.T.C. So ◽  
T. French ◽  
E. Gratton
Keyword(s):  
Fluorescence Microscopy ◽  
Stimulated Emission ◽  
Time Resolved ◽  
Polarization Imaging ◽  
Pump Probe

Pump-Probe Measurements Using Silicon Nanocrystal Waveguides

2003 ◽  
Vol 770 ◽  
Author(s):  
Nathanael Smith ◽  
Max J. Lederer ◽  
Marek Samoc ◽  
Barry Luther-Davies ◽  
Robert G. Elliman
Keyword(s):  
Probe Beam ◽  
Time Resolution ◽  
Pump Beam ◽  
Silicon Nanocrystals ◽  
Continuous Wave ◽  
Optical Gain ◽  
Optical Pump ◽  
Time Resolved ◽  
Pump Probe ◽  
Probe Measurements

AbstractOptical pump-probe measurements were performed on planar slab waveguides containing silicon nanocrystals in an attempt to measure optical gain from photo-excited silicon nanocrystals. Two experiments were performed, one with a continuous-wave probe beam and a pulsed pump beam, giving a time resolution of approximately 25 ns, and the other with a pulsed pump and probe beam, giving a time resolution of approximately 10 ps. In both cases the intensity of the probe beam was found to be attenuated by the pump beam, with the attenuation increasing monotonically with increasing pump power. Time-resolved measurements using the first experimental arrangement showed that the probe signal recovered its initial intensity on a time scale of 45-70 μs, a value comparable to the exciton lifetime in Si nanocrystals. These data are shown to be consistent with an induced absorption process such as confined carrier absorption. No evidence for optical gain was observed.

Investigation on nonlinear dynamics of ZnO using time-resolved pump-probe technique with phase object

2011 ◽  
Author(s):  
Lirong Ge ◽  
Min Shui ◽  
Xiao Jin ◽  
Zhongguo Li ◽  
Yinglin Song
Keyword(s):  
Nonlinear Dynamics ◽  
Phase Object ◽  
Time Resolved ◽  
Pump Probe ◽  
Probe Technique
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