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Seminar on Theoretical and Computational Physics:
TitleCavity-enhanced channeling of emission from an atom into a nanofiber
SpeakerD.Sc. Pham Le Kien
AffiliationInstitute of Physics (IOP, VAST), UEC, Tokyo, Japan
DateTuesday, 23-03-2010
Time10g, Thứ Ba
LocationInstitute of Physics, 10 Dao Tan, Ba Dinh, Hanoi
Abstract

We study spontaneous emission of an atom near a nanofiber with two fiber-Bragg-grating (FBG) mirrors. We show that the coupling between the atom and the guided modes of the nanofiber can be significantly enhanced by the FBG cavity even when the cavity finesse is moderate. We find that, when the fiber radius is 200 nm and the cavity finesse is about 30, up to 94% of spontaneous emission from the atom can be channeled into the guided modes in the overdamped-cavity regime. We show numerically and analytically that vacuum Rabi oscillations and strong coupling can occur in the FBG cavity even when the cavity finesse is moderate (about 30) and the cavity length is large (on the order of 10 cm to 1 m), unlike the case of planar and curved Fabry-Perot cavities.