Program

P.5 -- Poster, NCTP-41

Date: Tuesday, 2 August 2016

Time: 08h30 - 10h00

Spontaneous decay rate of a two-level atom in the presence of a multilayered-cylindrical waveguide

Tran Minh Hien (1) and Ho Trung Dung (2,3)

(1) Institute of Physics, Academy of Science and Technology, 1 Mac Dinh Chi St., District 1, Ho Chi Minh city, Vietnam (2) Theoretical Physics Research Group, Ton Duc Thang University, 19 Nguyen Huu Tho St., District 7, Ho Chi Minh city, Vietnam (3) Faculty of Applied Sciences, Ton Duc Thang University, 19 Nguyen Huu Tho St., District 7, Ho Chi Minh city, Vietnam

We consider the spontaneous decay rate of a two-level excited atom positioned in a multilayered-cylindrical waveguide. We focus on the direction of dipole moment parallel to the cylinder axis. Three types of configuration are studied including a three-layer Drude-Lorentz type, a four-layer Lorentz-bandgap type, and a Bragg-distributed mirror type. It is shown that, if the atom is located inside of the waveguide, in the bandgap between the transverse and the longditudinal frequency of the medium filling the wall of the resonator, the atom can be trapped in the excited state. Beside, the decay rate experiences most pronounced modifications in the bandgap of the wall of the mirror. The level Lamb shift is also considered in detail.

Presenter: Trần Minh Hiến