Abstract

A closed four-level system in atomic vapor is proposed, which is made to possess left handedness by means of the technique of quantum coherence. The method of density matrix is utilized in view of the rotating-wave approximation and the effect of local-field in dense gas. The result of the numerical simulation shows that the negative permittivity and negative permeability of the medium can be achieved simultaneously (i.e., the left handedness) in a wider frequency band under appropriate parameter conditions. Furthermore, when analyzing the dispersion property of the left-handed material, we find that the probe beam can be controlled to change from superluminal to subluminal or vice versa via changing the detuning of the probe field.

© 2010 Chinese Optics Letters

Splitting of electromagnetically induced absorption signal in a five-level V-type atomic system

Khairul Islam, Amitava Bandyopadhyay, Bankim Chandra Das, Satyajit Saha, Sankar De, and Dipankar Bhattacharyya
J. Opt. Soc. Am. B 34(12) 2550-2557 (2017)

Efficient electromagnetically induced phase grating via quantum interference in a four-level N-type atomic system

Tayebeh Naseri and Rasoul Sadighi-Bonabi
J. Opt. Soc. Am. B 31(10) 2430-2437 (2014)

Electromagnetically induced grating in the microwave-driven four-level atomic systems

Rasoul Sadighi-Bonabi, Tayebeh Naseri, and Morteza Navadeh-Toupchi
Appl. Opt. 54(3) 368-377 (2015)

Spontaneous emission spectrum of a V-type three-level atom in a Fabry–Perot cavity containing left-handed materials

Xiaodong Zeng, Mingzhang Yu, Dawei Wang, Jingping Xu, and Yaping Yang
J. Opt. Soc. Am. B 28(9) 2253-2259 (2011)

Electromagnetically induced phase grating via population trapping condition in a microwave-driven four-level atomic system

Tayebeh Naseri and Rasoul Sadighi-Bonabi
J. Opt. Soc. Am. B 31(11) 2879-2884 (2014)