STEEP DISPERSION AND GROUP-VELOCITY BELOW C 3000 IN COHERENT POPULATION TRAPPING/

Authors
SCHMIDT O WYNANDS R HUSSEIN Z MESCHEDE D
Citation
O. Schmidt et al., STEEP DISPERSION AND GROUP-VELOCITY BELOW C 3000 IN COHERENT POPULATION TRAPPING/, Physical review. A, 53(1), 1996, pp. 27-30
Citations number
23
Categorie Soggetti
Physics
Journal title
Physical review. A → ACNP
ISSN journal
10502947
Volume
53
Issue
1
Year of publication
1996
Pages
27 - 30
Database
ISI
SICI code
1050-2947(1996)53:1<27:SDAGBC>2.0.ZU;2-3
Abstract
We have measured the index of refraction in the region of a coherent p opulation trapping resonance in a cesium vapor cell with an interferom etric technique. We find very high normal dispersion (up to dn/df=9.7x 10(-12) Hz(-1)) at low absorption. From our spectra we obtain very sma ll group velocities below c/3000. This corresponds to a delay time of more than 200 ns for a cesium cell 20 mm in length, equivalent to more than 60 m of propagation in vacuum.