Unidirectional and controllable higher-order diffraction by a Rydberg electromagnetically induced grating

Dandan Ma, Dongmin Yu, Xing-Dong Zhao, and Jing Qian
Phys. Rev. A 99, 033826 – Published 13 March 2019

Abstract

A method for diffracting the weak probe beam into unidirectional and higher-order directions is proposed via a Rydberg electromagnetically induced grating, providing a way for the implementations of quantum devices with cold Rydberg atoms. The proposed scheme utilizes a suitable position-dependent adjustment to the two-photon detuning besides the modulation of the standing-wave coupling field, producing an in-phase modulation which can change the parity of the dispersion. We observe that when the modulation amplitude is appropriate, a perfect unidirectional diffraction grating can be realized. In addition, due to the mutual effect between the van der Waals (vdW) interaction and the atom-field interaction length that deeply improves the dispersion of the medium, the probe energy can be counterintuitively transferred into higher-order diffractions as increasing the vdW interaction, leading to the realization of a controllable higher-order diffraction grating via a strong blockade.

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  • Received 11 November 2018

DOI:https://doi.org/10.1103/PhysRevA.99.033826

©2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Dandan Ma1, Dongmin Yu1, Xing-Dong Zhao2, and Jing Qian1,*

  • 1State Key Laboratory of Precision Spectroscopy, Department of Physics, School of Physics and Material Science, East China Normal University, Shanghai 200062, China
  • 2College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China

  • *jqian1982@gmail.com

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Vol. 99, Iss. 3 — March 2019

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