Stimulated emission and multi-peaked absorption in a four level N-type atom |
| |
Authors: | Wang Kai Gu Ying and Gong Qi-Huang |
| |
Institution: | State Key Laboratory for Mesoscopic Physics, Department of Physics,Peking University, Beijing 100871, China |
| |
Abstract: | Absorption and refraction of the inner transition F2\leftrightarrow
F3 of the closed four level N-type atom have been investigated under a
weak field. The outer transitions F1\leftrightarrow F3 and
F2\leftrightarrow F4 are resonantly interacted with drive field with
frequency \omegac and Rabi frequency \Omegac, and saturation
field with \Omegas and \Omegas, respectively. For the suitable Rabi
frequencies \Omegac and \Omegas, we obtain
the Mollow absorption
spectrum of probe field. The reason is that the drive field excites the atom
to the upper level Fc and simultaneously the saturation field takes
the atom out of the lower level F2, leading to the stimulated emission.
Meanwhile, due to the dynamic energy splitting induced by the drive and
saturation fields, the two- and four-peaked absorption spectra are observed.
At the zero off-resonance detuning of probe field, we also find the transfer
of dispersion from negative to positive with an increment of \Omegas.
Finally, the refractive index enhancement is predicted for a wide spectral
region. |
| |
Keywords: | stimulated emission multi-peaked absorption |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|