Atom-Field Interaction in a Standing-Wave Cavity

Young-Tak Chough

Luis A. Orozco, G. T. Foster, J. Gripp +1 more

Mostafa Sahrai, H. Tajalli

Coherent interaction of an atom with a position-dependent standing-wave cavity field can impart position information of a moving atom through the cavity leading to subwavelength atom localization. We show that the position of the atom along the standing-wave field is determined when the probe-field absorption is measured. We find out that absorption of the weak probe field at a certain frequency leads to subwavelength localization of the atom in either of the two half-wavelength regions of the cavity field by appropriate choice of the system parameters. In addition, we demonstrate that the position information of a three-level V-shaped moving atom strongly depends on the relative phase of applied fields. By appropriate choice of the relative phase, it is shown that the scheme can be used for localizing an atom flying through the standing-wave field to the sub-half-wavelength domain.

Na Li, Yun Su, Shuaiqi Yu +1 more

Abstract In this letter, we discuss the Fraunhofer diffraction in a hybrid system composed of an optomechanical cavity and a three-level atomic system. The hybrid system interacts via a cavity mode as a probe field and a standing-wave (SW) field from which the atomic system is derived. The susceptibility can be influenced by the interaction between the cavity mode, the atomic system and the oscillating mirror of the optomechanical cavity. The interaction between the cavity mode and the atomic ensemble leads to the generation of nonlinear equations which are solved via the perturbation method. Here, we have found that the amplitude and phase modulation of the system can be controlled via cavity detuning and the intensity of the SW field. By adjusting the amplitude and phase modulations of the system, the Fraunhofer diffraction of the probe field can be controlled easily for different orders of the grating.

A. Vidiella-Barranco, José Antonio Roversi, H. M. Moya-Cessa

Muhammad Javed Akram, Fazal Ghafoor, M. Miskeen Khan +1 more

In this study, a standing wave in an optical nano cavity with Bose-Einstein Condensate (BEC) constitutes one dimensional optical lattice potential in the presence of finite two bodies atomic interaction. We report that interaction of a BEC with standing field in an optical cavity coherently evolve to exhibit Fano resonances in the output field at probe frequency. The behavior of the reported resonance shows an excellent compatibility with the original formulation of asymmetric resonance as discovered by Ugo Fano. Based on our analytical and numerical results, we find that the Fano resonances and subsequently electromagnetically induced transparency of the probe pulse can be controlled through the intensity of the cavity standing wave field and the strength of the atom-atom interaction in the BEC. In addition, enhancement of the slow light effect by the strength of the atom-atom interaction and its robustness against the condensate fluctuations are realizable using presently available technology.