Coherently induced grating in refractive index enhanced medium

doi:10.1088/1674-1056/26/12/124209

Abstract We demonstrate a scheme for coherently induced grating based on a mixture of two three-level atomic species interacting with two standing-wave fields. As a result of interaction between the absorptive and amplified Raman resonances, the refractive index of the medium can be enhanced and modulated periodically. Then a sinusoidal grating, which can diffract the probe field into high-order directions, is coherently formed in the medium. The proposed scheme is theoretically investigated in a mixture of atomic isotopes of rubidium. The results show that the diffraction efficiency depends strongly on the two two-photon detunings of the two Raman transitions and the intensities of the two driving standing-wave fields. The proposed electromagnetically induced grating scheme may be applied to the all-optical switching and beam splitting in optical networking and communication.

Keywords: refractive index enhancement electromagnetically induced grating electromagnetically induced transparency active Raman gain

Received: 05 April 2017
Revised: 15 July 2017
Accepted manuscript online:

PACS:	42.50.Gy	(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
	42.65.An	(Optical susceptibility, hyperpolarizability)
	42.25.Fx	(Diffraction and scattering)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11204367 and 61475191) and the Fundamental Research Funds for the Central Universities, China (Grant Nos. GK201503022 and GK201601008).

Corresponding Authors: Ren-Gang Wan
E-mail: wrg@snnu.edu.cn

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Zhuan-Zhuan Liu(刘撰撰), Yu-Yuan Chen(陈煜远), Jia-Yu Yuan(原佳宇), Ren-Gang Wan(万仁刚) Coherently induced grating in refractive index enhanced medium 2017 Chin. Phys. B 26 124209

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Coherently induced grating in refractive index enhanced medium

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