Selective control of photoassociation of alkaline earth dimers: A theoretical study

Abstract

The laser synthesis of alkaline earth dimers (Be2, Mg2, Ca2, Sr2, and Ba2) is investigated by theoretical calculation. Photoassociation based on ab initio calculations is rationalized by Franck‐Condon filtering. The optimal target states of photoassociations have been obtained, which are A1∑+u state for Be2, Mg2, and Ca2, and are B1∑+u state for Sr2 and Ba2, corresponding to vibrational transition bands from X1∑+g to excited state are 0‐1, 0‐7, 0‐10, 0‐13, and 0‐3, respectively. The proposed laser drive transitions to target states are also investigated that range from 350 to 740 nm. By using quantum wave‐packet dynamic methods, we calculated the absorption cross sections of photon energy and yields for the selected states of photoassociation. It show that the most sensitive molecules for quantum selective control of photoassociation are Be2 and Ba2 for alkaline earth dimers. These important parameters will provide a feasible scheme for further experimental researches.

Investigating the Selective Control of Photoassociation of Yb2

“…e projections of time-dependent wave functions of initial states on the vibrational eigenstates of excited states, reflecting the photoassociation yields, were investigate. e detailed calculation process can be found in our previous published article [35]. By changing the laser parameters and pulse shape, we studied the effects on yield and purity of photoassociation of Yb 2 molecule.…”