3 papers
physics.optics2020
Superluminal light propagation in a normal dispersive medium
Zahra Amini Sabegh, Mohammad Mahmoudi
We study the propagation of a Laguerre-Gaussian (LG) beam through a dispersive atomic medium. We restrict ourselves to applying a weak probe field and three strong coupling fields…
physics.optics2019
Orbital angular momentum transfer via spontaneously generated coherence
Zahra Amini Sabegh, Mohammad Mohammadi, Mohammad Ali Maleki +1
We study the orbital angular momentum (OAM) transfer from a weak Laguerre-Gaussian (LG) field to a weak plane-wave in two closed-loop three-level -type atomic systems. In the fi…
physics.optics2015
Gain-assisted superluminal microwave pulse propagation via four-wave mixing in superconducting phase quantum circuits
Z. Amini Sabegh, A. Vafafard, M. A. Maleki +1
We study the propagation and amplification of a microwave field in a four-level cascade quantum system which is realized in a superconducting phase quantum circuit. It is shown tha…