title: Pulse train induced rotational excitation and orientation of a polar molecule.
abstract: We investigate theoretically the rotational excitation and field free molecular orientation of polar HBr molecule, interacting with train of ultrashort laser pulses. By adjusting the number of pulses, pulse period and the intensity of the pulse, one can suppress a population while simultaneously enhancing the desired population in particular rotational state. We have used train of laser pulses of different shaped pulse envelopes. The dynamics and orientation of molecules in the presence of pulse train of different shapes is studied and explained.
authors.affiliation: Department of Physics, Swami Shraddhanand College, University of Delhi, Delhi 110036, India. Electronic address: ashishtyagi.du@gmail.com.
authors.forename: Ashish
authors.initials: A
authors.lastname: Tyagi
authors.affiliation: Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India. Electronic address: urvashivarsheney@yahoo.co.in.
authors.forename: Urvashi
authors.initials: U
authors.lastname: Arya
authors.affiliation: Department of Physics, Hansraj College, University of Delhi, Delhi 110007, India. Electronic address: bhavna.vidhani@gmail.com.
authors.forename: Bhavna
authors.initials: B
authors.lastname: Vidhani
authors.affiliation: Department of Physics, Swami Shraddhanand College, University of Delhi, Delhi 110036, India. Electronic address: vprasad@ss.du.ac.in.
authors.forename: Vinod
authors.initials: V
authors.lastname: Prasad
mesh_terms: D018054:Hydrobromic Acid / Q000737:chemistry*; D007834:Lasers; D008027:Light; D011789:Quantum Theory; D013997:Time Factors
chemical_list: D018054:Hydrobromic Acid
keywords: Ladder system; Orientation; Pulse train; Rotational excitation