Field Ionization of Cold Atoms near the Wall of a Single Carbon Nanotube
Abstract
We observe the capture and field ionization of individual atoms near the side wall of a single suspended nanotube. Extremely large cross sections for ionization from an atomic beam are observed at modest voltages due to the nanotube’s small radius and extended length. The effects of the field strength on both the atomic capture and the ionization process are clearly distinguished in the data, as are prompt and delayed ionizations related to the locations at which they occur. Efficient and sensitive neutral atom detectors can be based on the nanotube capture and wall ionization processes.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2010
- DOI:
- 10.1103/PhysRevLett.104.133002
- arXiv:
- arXiv:1004.2644
- Bibcode:
- 2010PhRvL.104m3002G
- Keywords:
-
- 37.10.Gh;
- 07.77.Gx;
- 79.70.+q;
- 85.35.Kt;
- Atom traps and guides;
- Atomic and molecular beam sources and detectors;
- Field emission ionization evaporation and desorption;
- Nanotube devices;
- Physics - Atomic Physics;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- High Energy Physics - Phenomenology;
- Quantum Physics
- E-Print:
- Article (8 pages) and Supplementary Information (4 pages). Associated figure appeared on cover of the April 2, 2010 issue of PRL.