We examine theoretically the status of intense laser induced orientation- a field of study which lies at the interface of Intense laser physics and chemical dynamics and having potential applications such as high-harmonic generation and control of chemical reactions. The evolution of rotational wave packet and its dynamics leading to orientation is the topic of present discussion. The orientation of polar molecule can occur in adiabatic and non-adiabatic conditions with the rotational period of the molecule under consideration. The discussion is basically limited to non-adiabatic rotational excitation (NAREX) i.e. cases in which pulse duration is shorter than the rotational period of a molecule. We basically emphasize on sin-square (SSQR) pulse and square (SQR) pulse. We summarize the current discussion by presenting a consistent theoretical approach for describing the action of such pulses on movement of molecules. The impact of particular pulse shape on the post pulse dynamics is also calculated and analyzed. Also, the effect of laser parameters viz. pulse duration, elliptic parameter and system temperature is also under concern.

Orientation, Sin-square (SSQR) Pulse, Square (SQR) Pulse