847 research outputs found
Nanofiber Fabry-Perot microresonator for non-linear optics and cavity quantum electrodynamics
We experimentally realize a Fabry-Perot-type optical microresonator near the
cesium D2 line wavelength based on a tapered optical fiber, equipped with two
fiber Bragg gratings which enclose a sub-wavelength diameter waist. Owing to
the very low taper losses, the finesse of the resonator reaches F = 86 while
the on-resonance transmission is T = 11 %. The characteristics of our resonator
fulfill the requirements of non-linear optics and cavity quantum
electrodynamics in the strong coupling regime. In combination with its
demonstrated ease of use and its advantageous mode geometry, it thus opens a
realm of applications.Comment: 4 pages, 3 figure
Torque of guided light on an atom near an optical nanofiber
We calculate analytically and numerically the axial orbital and spin torques
of guided light on a two-level atom near an optical nanofiber. We show that the
generation of these torques is governed by the angular momentum conservation
law in the Minkowski formulation. The orbital torque on the atom near the fiber
has a contribution from the average recoil of spontaneously emitted photons.
Photon angular momentum and atomic spin angular momentum can be converted into
atomic orbital angular momentum. The orbital and spin angular momenta of the
guided field are not transferred separately to the orbital and spin angular
momenta of the atom
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