Two types of adiabatons in electromagnetically induced transparency (4 pages)

Pablo Barberis-Blostein

Wei Zhong Jiang, Q.-f. Chen, Y.-s. Zhang

Enrique Conejero Jarque

Oleg M. Parshkov

We present the results of numerical simulation of the adiabaton emergence process in the lambda scheme of degenerate energy levels with the quantum number of the total angular momentum, J = 0, 2, 1. In the case of linear polarisation of the input highfrequency field and circular polarisation of the input low-frequency field, the energy of the high-frequency component of the adiabaton is shown to focus in two or more pulses: in one of the pulses the field is circularly polarised in a direction opposite to that of the low-frequency input field, whereas in other pulses it is circularly polarised in the same direction as that of the field. This effect is caused by the specific character of electromagnetically induced transparency in the lambda scheme under study and by the trends introduced by self-induced transparency in it.

Zhengyang Bai, Chao Hang, Guoxiang Huang

R. N. Shakhmuratov, J. Odeurs

We analyze the energy transformation of light propagating with slow group velocity in a three-level medium. Depending on the excitation scheme, the energy of the probe can be transformed into the coupling field or into the atomic excitation. As a result a zero-energy adiabaton develops for the lambda scheme or an energy carrying adiabaton is formed for the ladder scheme. In both cases slow light is produced by the atoms, also feeding this light by the energy stored in the metastable state (ladder scheme) or borrowing the energy from the coupling field (lambda scheme).