Pump-probe delay

Figure 8-5. Transmission difference spectra of m-LPPP films at 7=77 K excited at 3.2 eV for various pump-probe delays. The inset zooms out the low energy region for 0 ps (solid line) and 400 ps (dashed line) delay. Doping induced absorption (D1A) data are also shown for comparison (from Ref. (251 with permission).

Figure 8-7. SE decay al 2.53 cV in m-LPPP films il T=77 K versus pump-probe delay at lhrce different excitation fluences (from Ref. 125] with permission).

Figure 8-9. Modulus of AT versus pump-probe delay al 1.48 cV and 2.53 cV (from Ref. [25J widi permission).

In Figure 8-12 we show the field-induced differential transmission spectra (AT/I )MI for negatively biased LED at 13 V and at different pump-probe delays. 

Figure 8-13. Field-induced differential transmission (-A7ZT)a - a 1-91 (solid line) and 2.53 eV (dots) as a function of pump-probe delay. In the upper panel we also show, as a dashed line, the pump-pulse autocorrelation (from Ref. [40] with permission).

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 8-12. Field-induced differential transmission spectra (A7/T)a)/.- for a positive bias of 13 V and different pump-probe delays (front Ref. [401 with permission).

Figure 8-14. (a) (—versus pump-probe delay al 1.91 eV lor VW.= -16 V and pump excitation intensities 1.2 mJ/ein2 (solid line) and 0.24 niJ /cm" (dashed line). The inset shows (-A7/T)Mr at 1.91 eV and 20 ps versus excitation intensity, (b) same as (a) Tor pump excitation intensity 1.2 nij/eni2 with V[1M =-16 V (solid line) and th, is=-8 V (dashed line). The inset shows ( A7//)/h/. at 1.91 eV and 20 ps versus field open squares=posilive bias filled eirclcs=negative bias (adapted from Ref. (40J). 

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,...

In this expression, Erf denotes the error function, while M2 is the full width at half maximum (FWHM) of the Gaussian probe pulse. The calculation of the total ionization probability S(t) therefore only requires the knowledge of the excited state wavepacket x e(r,R, f) at time t = T. Note that the origin of time (t = 0) is chosen here as the peak intensity of the pump pulse, and consequently the quantity Tin Eq. (1) corresponds to the pump-probe delay. 

Fig. 2. Ionization signals S( T) as functions of the pump-probe delay T. CH3CN -Nal is shown on the left panel (a) and CH3CN---CsI on the right panel (b). The probe duration and wavelength are 50 fs (FWHM) and 315 nm for Nal and 378 nm for Csl.

Fig. 3. Reconstruction of the transient absorption spectra of HPTA in DCM in the presence of 9xlO 3 M DMSO at different pump-probe delays. The time-zero absorption and gain bands of the photoacids are moving toward each other following the relaxation of the solute-solvent interactions to their steady-state values. Full lines are the superposition of the individual absorption and gain bands of HPTA.

Fig. 1. (a) Differential absorbance spectra of native PYP, after excitation at 430 nm, at different pump-probe delays. The scattered pump light around 430 nm has been masked. Steady-state absorption and fluorescence spectra are represented with dotted lines, (b) Kinetics extracted from the transient spectra at selected wavelengths... 

Fig. 3. (a) chemical structure of the synthetic chromophore compound 1-28 compared to that of the protein (R1 and R2 correspond to amino-acids which link the chromophore to the rest of the protein), (b) Differential transmission spectrum, at magic angle and for different pump-probe delays, of 1-28 in dioxan solution (6 pg/ml) excited in the conditions described in the caption of fig. 1. 

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... 

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