Potential energy curves dressed

Once the mechanisms of dynamic processes are understood, it becomes possible to think about controlling them so that we can make desirable processes to occur more efficiently. Especially when we use a laser field, nonadiabatic transitions are induced among the so-called dressed states and we can control the transitions among them by appropriately designing the laser parameters [33 1]. The dressed states mean molecular potential energy curves shifted up or down by the amount of photon energy. Even the ordinary type of photoexcitation can be... 

Fig. 1.2. Potential energy curves of H2 and Hj showing ionization and dressed states in a laser field. The dressed curves lead to bond softening and a distortion of the potential curve of the ground state of the ion, as will be discussed in Sect. 1.2.3...

Figure 1. Incoherent Interference Control (IIC) scheme and potential energy curves for Na2- This scheme is composed of a 2 wi photon process proceeding from an initial state, assigned here as (v = 5, J = 37), via the u = 35, J = 36, 38 levels, belonging to the interacting A1 Xu /3nu electronic states, and a one 2 photon dresses the continuum with the (initially unpopulated) v = 93, J = 36 and v = 93, J = 38 levels of the A1 Xu /3H electronic states.

Electromagnetic Field-Dressed Diabatic and Adiabatic Potential Energy Curves. 177... 

It is convenient to treat intense electromagnetic field problems in the dressed molecular states picture (see review by Giusti-Suzor, et al, (1995)). This picture allows one to think about intense field problems in a framework that closely resembles the weak field, diabatic or adiabatic states picture that is the primary focus of this book. In the dressed states picture the photon energy is added to, or subtracted from, the field-free potential energy curves. One obtains field-dressed potential curves. 

Figure 3.12 Field-dressed potential energy curves for HJ interacting with a 532nm laser field. The field-dressed diabatic curves are shown as full lines. The field-dressed adiabatic curves, shown as dotted and dashed curves, correspond respectively to laser intensities of 1 x 1013 W/cm2 and 4 x 1013 W/cm2 (from Giusti-Suzor, et al., 1995).

Figure 2.1 Field-dressed potential energy curves of Hj (X = 532 nm), in the diabatic (solid lines) and adiabatic (broken lines for / = 10 W/cm and dotted lines for / = 5 x 10 W/cm ) frames. Curve-crossing regions are outlined by rectangular boxes XI, X2, and X3. The energies of the v = 2,4, 5 vibrational levels are indicated by thin horizontal lines.

Figure 2.7 Potential energy curves of Hj" in a 750 nm laser-dressed diabatic representation (black solid lines). Are also indicated the lower adiabatic curves resulting from the diagonalization of the radiative interaction for two intensities (/ = 3 x plO W/cm reached at mid-pulse time, in red dashed line and / = 10 W/cm in doted red line). Ej, E, and 9 represent the kinetic energies issued from v+ = 7, 8, and 9 for the typical XUV-IR delays [about 100 fs (a) and Ofs (b)].

Figure B3.1 (a) The potential energy curves of Hg + Hg and Hg + Hg [adapted from P. Gross and M. Dantus, J. Chem. Phys. 106, 8013 (1997)]. The long-range attraction and the well (depth 370 cm ) in the ground state potential, Vg R), are hardly noticeable on the energy scale shown. The vertical asymptotic separation of the two potential curves is the resonance excitation energy of a Hg atom, corresponding to the Sq- Pi transition. When the two Hg atoms are closer, the electronic energy gap (4.89 eV for an isolated atom) is lowered due to the stronger attraction in the excited state. At the relative separation / x the iaser frequency matches the potentiai gap. In other words, the Franck-Condon "window" is where the two atoms are at the separation Rx apart. A verticai transition at Rx prepares a bound vibrationai state of the excited eiectronic state. This is known as iaser-assisted recombination, Probiem O. (b) Panei (a) drawn in the dressed states picture.

The electromagnetic radiation field is taken into account by adding the energy of the photons to the various molecular potential curves, Vi(R). If the photon number is initially N, when n photons are absorbed, the remaining number of photons is N — n. The resultant field-dressed diabatic state has potential energy... 

Figures 8 and 9 show relaxed triangular plots in mass-unweighted hyperspherical coordinates (all masses are taken equal to unity) for the two lowest A adiabatic sheets of NO2 according to a modified version of the 8x8 DMBE potential energy surface reported in Ref. 124. As in previous work, the parameterization has been done by dressing the nd diatomic curves, using simple three-body energy terms whose parameters have been adjusted by a trial-and-error procedure. The notable features in Figure 8 are the deep minimum of the 1 adiabatic sheet which is...

Figures 9A and 9B are photofragment images of D+ following irradiation of D2 with 532-nm light. All of the features can be assigned to dissociation of different vibrational levels of D2 by nominally either one-, two, or three-photon absorption. Because two-photon absorption to the 2p

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