Magnetic whispering-gallery mirror for atoms

Abstract

Videotape with a sinusoidal magnetization of 31 m wavelength is used to reflect Cs atoms with unit reflectivity in a 75 m/s atomic beam. The atoms serve as a probe, allowing us to measure the magnetic field at the surface. A technique is presented for mounting the videotape so that its surface can be curved to a specific shape or made flexible. We show that such a reflector provides high-quality grazing-incidence atom optics and we demonstrate deflections as large as 23°in a whispering-gallery geometry.

Cold atoms in videotape micro-traps

“…After recording, a piece of the videotape is glued to a glass coverslip 150 µm thick using a UHV-compatible epoxy (BYLAPOX 7285), as described in references [19,20]. This is coated with a ∼ 5 nm adhesion layer of chromium and ∼ 400 nm of gold in order to make the surface of the chip reflect 780 nm laser light.…”

Interference of the whispering gallery states of antihydrogen

“…As partial frequencies ω 12 and ω 23 are close to each other, the period T r is large compared to the characteristic period of beatings. The value of T r is sensitive to small variations of partial frequencies, produced by any additional interaction in the system.…”

Ridged atomic mirrors and atomic nanoscope

“…Similarly, for w > 0, we could represent the reflectivity as R(L, , K, s, w) = R(L/w, /w, Kw, s, 1), (10) and reduce the number of variables. In this paper, we keep all the five variables; this simplifies the consideration of limiting cases K = ∞ and w = 0.…”

“…There has been certain progress in the manipulation of atoms, using narrow localization of light fields [3], evanescent optical wave [4][5][6] or static electric or magnetic fields [7][8][9][10]. The focusing of atomic beam with a concave mirror [11], as well as with a Fresnel atomic lens [12], is achieved; atom interferometry [13] and atom holography [14] are demonstrated.…”