Eur. Phys. J. D (2017) 71: 10
https://doi.org/10.1140/epjd/e2016-70631-5

Regular Article

Induced dual EIT and EIA resonances with optical trapping phenomenon in near/far fields in the N-type four-level system

¹ Department of Mathematics, Al-Azhar University, Faculty of Science (Women’s Section), P.O. Box 11754, Nasr City, Cairo, Egypt
² Department of Physics and Optical Engineering, Rose-Hulmann Institute of Technology, 47803 Terre Haute, USA

^a e-mail: kieosman@hotmail.com

Received: 8 October 2016
Received in final form: 23 November 2016
Published online: 17 January 2017

Abstract

The optical trapping phenomenon is investigated in the probe absorptive susceptibility spectra, during the interaction of four-level N-type atomic system with three transverse Gaussian fields, in a Doppler broadened medium. The system was studied under different temperature settings of ⁸⁷Rb atomic vapor as well as different non-radiative decay rate. The system exhibits a combination of dual electromagnetically induced transparency with electromagnetically induced absorption (EIA) or transparency (EIT) resonances simultaneously in near/far field. Also, the optical trapping phenomenon is considerably affected by the non-radiative decay rate.