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arXiv · 1302.1744

Few-Photon All-Optical {\pi} Phase modulation Based on a Double-{\Lambda} System

Yen-Chun Chen·Hao-Chung Chen·Hsiang-Yu Lo·Bing-Ru Tsai·Ite A. Yu·Ying-Cheng Chen·Yong-Fan Chen
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Abstract

We propose an efficient all-optical phase modulation based on a double-{\Lambda} system and demonstrate a {\pi} phase shift of a few-photon pulse induced by another few-photon pulse in cold rubidium atoms with this scheme. By changing the phases of the applied laser fields, one can control the property of the double-{\Lambda} medium. This phase-dependent mechanism makes the double-{\Lambda} system different form the conventional cross-Kerr-based system which only depends on the applied laser intensities. The proposed scheme provides a new route to generate strong nonlinear interactions between photons, and may have potential for applications in quantum information technologies.

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Yen-Chun Chen, Hao-Chung Chen, Hsiang-Yu Lo, Bing-Ru Tsai, Ite A. Yu, Ying-Cheng Chen, Yong-Fan Chen. 2013-02-07. Few-Photon All-Optical {\pi} Phase modulation Based on a Double-{\Lambda} System. https://arxiv.org/abs/1302.1744

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