Programme

I.6 -- Invited, VCTP-45

Date: Tuesday, 13 October 2020

Time: 14:30 - 15:00

Theoretical study of dynamic Stark-induced pi-electron rotations in low symmetry aromatic ring molecules beyond the frozen nuclear approximation

Hirobumi Mineo

Ton Duc Thang University, AIMaS

Effects of vibrational modes on dynamic Stark-induced pi-electron rotations in low-symmetry aromatic ring molecules were theoretically studied under the adiabatic approximation. The lowest vibronic states in the two electronic excited states are set to be degenerate by using two UV lasers. The parameters of the two lasers (frequencies, intensities) were determined under the condition in which the lowest two vibronic states are in equal energy with each other. The resultant degenerate state is called dynamic Stark-induced degenerate vibronic state (DSIDVS), which is an essential key to generate coherent pi-electron angular momentum of aromatic ring molecules taking into account vibrational degrees of freedom. Closed forms of vibronic state wavefunctions are derived by solving the time-dependent Schrödinger equations analytically. Here the number of the vibronic excited states were restricted to extract the essential role of vibrational mode on pi-electron rotations. In this work we adopt toluene molecule, which is one of the typical aromatic ring molecules with lower symmetry.

Presenter: Hirobumi Mineo