التفاصيل البيبلوغرافية
| العنوان: |
High-temperature alkali vapor cells with antirelaxation surface coatings. |
| المؤلفون: |
Seltzer, S. J.1, Romalis, M. V.1 |
| المصدر: |
Journal of Applied Physics. Dec2009, Vol. 106 Issue 11, p114905-114913. 8p. 2 Charts, 5 Graphs. |
| مصطلحات موضوعية: |
*PHYSICS research, *RELAXATION phenomena, *MOLECULAR relaxation, *THIN films, *SOLUTION (Chemistry), *SEMICONDUCTOR doping, *VAPOR density, *COATING processes |
| مستخلص: |
Antirelaxation surface coatings allow long spin relaxation times in alkali-metal cells without buffer gas, enabling faster diffusion of the alkali atoms throughout the cell and giving larger signals due to narrower optical linewidths. Effective coatings were previously unavailable for operation at temperatures above 80 °C. We demonstrate that octadecyltrichlorosilane (OTS) can allow potassium or rubidium atoms to experience hundreds of collisions with the cell surface before depolarizing, and that an OTS coating remains effective up to about 170 °C for both potassium and rubidium. We consider the experimental concerns of operating without buffer gas and with minimal quenching gas at high vapor density, studying the stricter need for effective quenching of excited atoms and deriving the optical rotation signal shape for atoms with resolved hyperfine structure in the spin-temperature regime. As an example of a high-temperature application of antirelaxation coated alkali vapor cells, we operate a spin-exchange relaxation-free atomic magnetometer with sensitivity of 6 fT/Hz and magnetic linewidth as narrow as 2 Hz. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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