Quantum beat observations in rubidium vapor

Quantum beating;Raman scattering;Four-wave mixing;Pump-probe spectroscopy;Alkali vapor

Ricconi, Brian

关键词: Quantum beating;    Raman scattering;    Four-wave mixing;    Pump-probe spectroscopy;    Alkali vapor;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/31936/Ricconi_Brian.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Probing the interactions between a mode-locked laser pulse and saturated rubidium vaporwith a pump–probe technique has resulted in observations of coherences within the atomthat persist longer than 150 ps. Quantum beats due to the interference between the 7Sand 5D_{5/2} energy states were observed by a four-wave mixing process. The differencefrequency between the 5D–5P_{3/2} and the 5P_{3/2}–5S transitions was also observed forinterpulse delays up to 180 ps. The temporal evolution of the beat amplitude indicates theexistence of a superfluorescent process and a scattering process detected simultaneouslywith the four-wave mixing process. A model was developed to explain the processes andwas used to predict the range of pulse parameters for which the scattering process andfour-wave mixing could be simultaneously detected.