1.
Observation of coherent transients in ultrashort chirped excitation of an undamped two-level system.
Phys Rev Lett
; 87(3): 033001, 2001 Jul 16.
Artículo
en Inglés
| MEDLINE
| ID: mdl-11461552
RESUMEN
The effects of coherent excitation of a two-level system with a linearly chirped pulse are studied theoretically and experimentally [in Rb (5s-5p)] in the low field regime. The coherent transients are measured directly on the excited state population on an ultrashort time scale. A sharp step corresponds to the passage through resonance. It is followed by oscillations resulting from interferences between off-resonant and resonant contributions. We finally show the equivalence between this experiment and Fresnel diffraction by a sharp edge.