Synopsis: Cavernous nanofibers

Forces on an atom from a fiber less than an optical wavelength in diameter may provide answers in quantum optics.
Synopsis figure
Illustration: F. Le Kien et al., Phys. Rev. A (2010)

An outstanding problem in quantum optics is how light interacts with atoms inside an optical cavity. In the strong-coupling regime—where the coupling between an atom and the cavity field dominates the rate with which the field leaks out of the cavity and that of spontaneous emission—a single atom can significantly affect the field, and the presence of a single photon can strongly affect the atom.

In a paper published in Physical Review A, Fam Le Kien and K. Hakuta, both at the University of Electro-Communications in Japan, analyze how nanofibers—fibers stretched thin with core diameters smaller than a wavelength—may complement atom-cavity technology. They study a nanofiber that combines with two built-in fiber Bragg grating (FBG) mirrors to form a cavity. A surrounding atom interacts with the optical field, confined in the transverse direction by the narrow fiber and in the longitudinal direction by the gratings. As a result, the dynamics of the mean number of photons closely tracks the translational motion of the atom traversing the standing-wave field formed by the two FBG mirrors.

This work may lead to applications in fiber optics, cavity quantum electrodynamics, cold and ultracold atoms, and quantum optics effects such as electromagnetically induced transparency. – Frank Narducci


More Announcements »

Subject Areas

Atomic and Molecular PhysicsOptics

Previous Synopsis

Quantum Information

Quantum guessing games

Read More »

Next Synopsis

Related Articles

Synopsis: Hydrogen  Bonding Comes to the Rescue
Chemical Physics

Synopsis: Hydrogen Bonding Comes to the Rescue

Hydrogen bonding may safeguard biomolecules against the damaging effects of UV light. Read More »

Viewpoint: Cold Results from Fast Lasers

Viewpoint: Cold Results from Fast Lasers

Ultrafast lasers show promise to cool down and trap atomic species inaccessible to more traditional methods. Read More »

Viewpoint: Showtime for Molecular Movies

Viewpoint: Showtime for Molecular Movies

Molecular movies of vibrating iodine molecules have been recorded in time-resolved x-ray and electron diffraction experiments. Read More »

More Articles