Indium single-ion optical frequency standard
| Autor: | Th. Becker, M. Eichenseer, M.N. Skvortsov, J. von Zanthier, Ekkehard Peik, Alexander Nevsky, Ch. Schwedes, H. Walther |
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| Rok vydání: | 2001 |
| Předmět: |
Zeeman effect
Materials science business.industry Resonance chemistry.chemical_element Frequency standard Laser Atomic clock Ion law.invention symbols.namesake Wavelength Laser linewidth Optics Stark effect chemistry law Laser cooling symbols Rotational spectroscopy Atomic physics business Indium Caesium standard |
| Zdroj: | Scopus-Elsevier The Hydrogen Atom ISBN: 9783540419358 |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.424471 |
| Popis: | A single laser cooled ion in a radiofrequency trap can serve as the basis for a highly stable optical frequency standard. We present recent results of our work on single indium ions, using the /sup 1/S/sub 0/ to /sup 3/P/sub 0/ transition at 236.5 nm wave-length as the clock transition. This resonance has a linewidth of only 0.82 Hz where systematic shifts should be controllable on the mHz level. A single In/sup +/ ion is stored in a miniature Paul-Straubel trap and laser cooled to a temperature of about 100 /spl mu/K. The clock transition is excited using a frequency quadrupled Nd:YAG laser. A fractional resolution of 1.3/spl middot/10/sup -13/ has been achieved so far (linewidth of 170 Hz at 1267 THz). The absolute frequency of the clock transition clock transition has been measured with an uncertainty of 2/spl middot/10/sup -13/ using a frequency chain and a methane-stabilized HeNe laser as a reference, that was calibrated with a cesium clock. |
| Databáze: | OpenAIRE |
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