Pump probe delay time

Figure 7-4. Excitation and probe pulse profiles along with pliotocxcilalion density and change in transmission as functions uf the pump-probe delay time.

Figure 7-y. Transient PM spectrum of DOO-PPV film al pump-probe delay times of 0 and I ns. Inset decay dynamics of PA bands and SE. 

Figure 5. The Fourier transformed signal AS[r, i] of I2/CCI4. The pump-probe delay times are I = 200 ps, 1 ns, and 1 ps. The green bars indicate the bond lengths of iodine in the X and A/A states. The blue bars show the positions of the first two intermolecular peaks in the pair distribution function gci-ci- (See color insert.)...

Figure 3.5 Near-field static ((a), (b)) and transient ((c)-(e)) transmission images of a single gold nanorod (length 300 nm, diameter 30nm). Observed wavelengths are 750nm (a), 900nm (b), and 780nm ((c)-(e)). The pump-probe delay times in ((c)-(e)) are 0.60,...

Fig. 1-left gives a general overview of the differential absorption spectra recorded for the free chromophore, oxyblepharismin, dissolved in DMSO for reference the steady-state absorption and (uncorrected) fluorescence spectra are also given below, in dotted lines. At all pump-probe delay times, the overall picture is a superposition of the structured bleaching and gain bands, as expected from the steady-state spectra, and broad transient absorption bands around 530 nm and 750 nm (weaker). These apparently homothetic spectra are very similar to... 

Fig. 5 Absorption spectrum of AT DNA oligomers around 3300 cm-1 (solid line) and absorbance difference spectra for several pump-probe delay times after excitation at 1740 cm-1 (FWHM 170 cm-1). The picosecond OH stretching response of water ranges from 3600 to 3050 cm-1. The spectrum at 0 ps delay time was obtained by averaging from -200 to 200 fs to eliminate nonabsorbing signal contributions.

Figure 14 Normalized time-resolved IR spectra of 400 rnn photodissociation of Mn2(CO)io in cyclohexane for several pump probe delay times. Vibrational cooling of the Mn(CO)5 radical can be observed to be complete by 70 ps. (Reprinted from Ref. 217. 2002, with permission from Elsevier)...

Beyond the first-order impulsive description of the difference signal, given above, a time-averaged difference density Ap = pon (R tp) — poff(R tp) is obtained from the transformation. The effect of the finite duration of the X-ray pulse is a convolution with the instantaneous signal according to (34). A deconvolution of the X-ray pulse is in principle possible, provided the intensity profile is known and that the pump-probe delay time tp is well defined. 

Fig. 2 Nuclear vibrational difference density (in arbitrary units) after laser excitation weighted by R2, as a function of the pump-probe delay time tp and intemuclear distance R. Adapted from [21]...

Fig. 3 Left calculated two-dimensional difference diffraction pattern AdS/dQ in arbitrary units for Nal at a pump-probe delay time of 500 fs. qy and q give the length of the component of q parallel and perpendicular to the laser polarization axis, which was set perpendicular to the wave vector of the X-ray beam. Middle plot of AdS/dQ as a function of P2(cos a) (q = 1.5 A-1, points correspond to those of the left image). Right isotropic and anisotropic curves Sn(q, tp) encoded in the two-dimensional pattern. Also shown is the result from an azimuthal integration over the detector surface. Adapted from [21]...

Fig. 4 Inversion of the diffraction signal at a pump-probe delay time of 1,650 fs. Left panel difference diffraction curves for the isotropic and anisotropic signal Right panel comparison between the original difference density and the inversion via (59). The upper curve is the original difference density, the other curves are reconstructions with different values of c/max and the damping constant k (see [21] for details). Adapted from [21]...

In the present framework, all the dynamical information, including that of electrons, is formally contained in the nuclear wavefunctions Xn(R,t) and Xc,k R,t), the coefficients of the stationary electronic wavefunctions in Eq. (3.51). After numerically solving Eq. (3.69) for the time-evolution of the nuclear wavefunctions, x R t) Xkim R, t), we may obtain the total ion population at any time for any given pump probe delay time tpr,... 

To emphasize that Xc,k R,t) is also a function of the parameter tpr, the pump-probe delay time when the probe laser ionizes the system, we have explicitly included it in Xc,ki R,t, tpT )-... 

Fig. 5.4 Total ion signals vs. pump-probe delay time. Probe polarization (a) parallel and (b) perpendicular to the pump polarization. (Reprinted with permission from Y. Arasaki et al, J. Chem. Phys. 119, 7913 (2003)).

Fig. 5.5 shows the photoelectron energy distributions as a function of pump-probe delay time with the probe polarization parallel to the molecular axis. As is expected from previous model studies of this system [63,78], the kinetic... 

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