Eur. Phys. J. D 21, 293-298 (2002)
https://doi.org/10.1140/epjd/e2002-00223-y

Role of electric field polarisation in rotational transitions

¹ Department of Physics and Astrophysics, University of Delhi, Delhi-110007, India
² Department of Physics, Swami Shardhanand College, Alipur, University of Delhi, Delhi-110036, India

Corresponding authors: ^a nsinghal@physics.du.ac.in - ^b vnautiyal@himalaya.du.ac.in - ^c manmohan@physics.du.ac.in

Received: 22 March 2002
Revised: 15 July 2002
Published online: 6 November 2002

Abstract

The molecular dynamics of polar diatomic molecule, interacting with linearly and circularly polarised laser field is studied. Non-perturbative quasi-energy technique is used to determine the rotational field surfaces. Degeneracy in different M-levels is found to be removed in the presence of circularly polarised electromagnetic radiation. In this paper, we present the calculations exhibiting the dynamics of rotational excitation of a linear molecule and characteristic features of spectra which become observable in considered fields.