Viteau M, Radogostowicz J, Bason M G, Malossi N, Ciampini D, Morsch O, Arimondo E
INO-CNR, Dipartimento di Fisica E. Fermi, Università di Pisa, Pisa, Italy.
Opt Express. 2011 Mar 28;19(7):6007-19. doi: 10.1364/OE.19.006007.
Rydberg spectroscopy of rubidium cold atoms trapped in a magneto-optical trap (MOT) was performed in a quartz cell. When electric fields acting on the atoms generated by a plate external to the cell were continuously applied, electric charges on the cell walls were created, as monitored on the Rydberg spectra. Avoiding accumulation of the charges and realizing good control over the applied electric field was instead obtained when the fields were applied only for a short time, typically a few microseconds. In a two-photon excitation via the 62P state to the Rydberg state, the laser resonant with the 52S-62P transition photoionizes the excited state. The photoionization-created ions produce an internal electric field which deforms the excitation spectra, as monitored on the Autler-Townes absorption spectra.
在一个石英池中对磁光阱（MOT）中捕获的铷冷原子进行了里德堡光谱实验。当持续施加由池外部的平板产生的作用于原子的电场时，池壁上会产生电荷，这在里德堡光谱中得到监测。相反，当仅在短时间（通常为几微秒）内施加电场时，可以避免电荷积累并实现对施加电场的良好控制。在通过62P态到里德堡态的双光子激发过程中，与52S - 62P跃迁共振的激光使激发态发生光电离。光电离产生的离子会产生一个内部电场，该电场会使激发光谱发生畸变，这在奥特勒 - 汤斯吸收光谱中得到监测。
