title: Adsorbed molecules in external fields: Effect of confining potential.
abstract: We study the rotational excitation of a molecule adsorbed on a surface. As is well known the interaction potential between the surface and the molecule can be modeled in number of ways, depending on the molecular structure and the geometry under which the molecule is being adsorbed by the surface. We explore the effect of change of confining potential on the excitation, which is largely controlled by the static electric fields and continuous wave laser fields. We focus on dipolar molecules and hence we restrict ourselves to the first order interaction in field-molecule interaction potential either through permanent dipole moment or/and the molecular polarizability parameter. It is shown that confining potential shapes, strength of the confinement, strongly affect the excitation. We compare our results for different confining potentials.
authors.affiliation: Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India. Electronic address: ashish.du.physics@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: psilotia21@gmail.com.
authors.forename: Poonam
authors.initials: P
authors.lastname: Silotia
authors.affiliation: Department of Physics, Pt. N. R. S. G. C., Maharishi Dayanand University, Rohtak, Haryana, India. Electronic address: anjalimaan2607@gmail.com.
authors.forename: Anjali
authors.initials: A
authors.lastname: Maan
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
keywords: Alignment; Hindered rotor; Molecule-surface interaction; Orientation; confining potential