Detection of a single lithium atom in a magneto-optical trap
- Authors
- Han, Hyok Sang; Yoon, Seokchan; Cho, D.
- Issue Date
- 6월-2015
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Lithium atom; Single-atom detection; Magneto-optical trap
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.66, no.11, pp.1675 - 1679
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 66
- Number
- 11
- Start Page
- 1675
- End Page
- 1679
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/93348
- DOI
- 10.3938/jkps.66.1675
- ISSN
- 0374-4884
- Abstract
- We report fluorescence detection of a single Li-7 atom in a magneto-optical trap (MOT). We use a double MOT system, which allows us to control the loading rate of the second MOT by simply turning on or off the first MOT and to use a modest magnetic field gradient of 46 G/cm. A single atom is trapped for longer than 100 s. The fluorescence from the trapped atoms is imaged onto an electron-multiplying charge-coupled device with a unit magnification factor by a pair of aspheric lenses. The numerical aperture of the objective lens is 0.22 with a collecting efficiency of 1.3%. Accumulated fluorescence is extracted by integrating the signal over a region of interest of 500x350 mu m(2). For a 200-ms exposure time, the fluorescence count from a single atom is 8.8x10(3) and the background count from scattered MOT beams is 6.8 x 10(4). We actively stabilize the trap beam power to reduce the noise and the measured noise is two times the statistical noise. Overall signal-to-noise ratio of the single-atom detection is 37/ae Hz. We also describe a modification of the system that is adapted to an experimental configuration for quantum manipulation of single atoms in a 1D optical lattice.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Science > Department of Physics > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.