title: Simple integrated single-atom detector.
abstract: We present a reliable and robust integrated fluorescence detector capable of detecting single atoms. The detector consists of a tapered lensed single-mode fiber for precise delivery of excitation light and a multimode fiber to collect the fluorescence. Both are mounted in lithographically defined SU-8 holding structures on an atom chip. 87Rb atoms propagating freely in a magnetic guide are detected with an efficiency of up to 66%, and a signal-to-noise ratio in excess of 100 is obtained for short integration times.
authors.affiliation: Atominstitut der Osterreichischen Universitäten, TU-Wien, Vienna, Austria.
authors.forename: Marco
authors.initials: M
authors.lastname: Wilzbach
authors.forename: Dennis
authors.initials: D
authors.lastname: Heine
authors.forename: Sönke
authors.initials: S
authors.lastname: Groth
authors.forename: Xiyuan
authors.initials: X
authors.lastname: Liu
authors.forename: Thomas
authors.initials: T
authors.lastname: Raub
authors.forename: Björn
authors.initials: B
authors.lastname: Hessmo
authors.forename: Jörg
authors.initials: J
authors.lastname: Schmiedmayer