Confined and interface polarons in cylindrical nanowires in an electric field

摘要

The effect of an electric field on the basic parameters of confined and interface polarons in cylindrical nanowires embedded in a non-polar matrix are studied theoretically for the first time. By using the Lee, Low, and Pines variational method, the analytical expressions for the quasi-one-dimensional Fr?hlich polaron self-energy and effective mass are obtained as functions of the wire radius and the strength of the electric field applied perpendicular to the wire axis. We have shown that the polaron self-energy as well as effective mass strongly depents on both the strengths of the electric field and on the wire radius. This will be taken into account in the interpretation of optical phenomena related to polaron motion in cylindrical nanowire, when the effect of an applied electric field competes with the spatial quantum confinement.