1- and 2-photon absorption by laser-cooled 85Rb using an optical nanofiber

Abstract

Articles you may be interested inBroadband transient absorption spectroscopy with 1-and 2-photon excitations: Relaxation paths and cross sections of a triphenylamine dye in solution ( ns 1/2 + np 1/2 )0 g − Rb 2 and Cs 2 photo-associative spectroscopy of weakly bound levels: Lu-Fano analysis coupled to an improved LeRoy-Bernstein formula.Optical transfer cavity stabilization using current-modulated injection-locked diode lasers Rev. Sci. Instrum. 77, 093105 (2006); 10.1063/1.2337094 Collimated, single-pass atom source from a pulsed alkali metal dispenser for laser-cooling experiments Rev. Sci. Instrum. 76, 023106 (2005);Abstract. The characteristics of a cold cloud of 85 Rb can be non-destructively examined using an optical nanofiber. The nanofiber is a submicron-diameter cylindrical waveguide fabricated from commercially-available optical fiber using a heat-and-pull rig. The nanofiber can be used as a 'dark' or 'bright' probe depending on whether laser light is coupled into the nanofiber. We demonstrate the use of an optical nanofiber as an absorption spectroscopy tool for cold atoms. A frequency-scanned probe beam is launched through the nanofiber and the resonant light is absorbed at the waist of the nanofiber by nearby cold 85 Rb atoms. We present recent singlephoton absorption results and comment on the role of surface interactions. Future work on 2photon absorption using excited state electronic transitions in 85 Rb is discussed.

Measurements on release–recapture of cold 85Rb atoms using an optical nanofibre in a magneto-optical trap

“…Spontaneous emission into the guided modes of an optical nanofiber is enhanced [18], making it an ideal high-sensitivity tool for channeling atomic fluorescence to a detector. Thus, in recent years, ONFs have also been shown to act as a measurement tool and delivery platform for cold atoms [19,20,21,22,23,24,25,26] and atomic vapours [27,28].…”

Optical nanofibres and neutral atoms

“…Among the numerous features offered by ONFs, one of the most interesting is their potential as tools for exploring nonlinear optics phenomena in atomic media. For example, it was proposed by Russell et al to use ONFs to provide intense light fields as needed for two-photon absorption by laser-cooled atoms [86]. This can be done using extremely low powers compared to similar experiments performed in free-space.…”

Spectroscopy, Manipulation and Trapping of Neutral Atoms, Molecules, and Other Particles Using Optical Nanofibers: A Review

“…7). Russell et al [78] have since proposed using the ONF in a cloud of cold atoms for the demonstration of 1-and 2-photon absorption.…”