Dynamic control of retrieval contrast in a Λ-type atomic system

doi:10.1088/1674-1056/21/5/054209

中国物理B ›› 2012, Vol. 21 ›› Issue (5): 54209-054209.doi: 10.1088/1674-1056/21/5/054209

Dynamic control of retrieval contrast in a Λ-type atomic system

张晓航¹,鲍倩倩¹,张岩¹,苏铭彻²,崔淬砺¹,吴金辉¹

1. College of Physics, Jilin University, Changchun 130012, China;
2. College of Computer Science and Technology, Jilin University, Changchun 130012, China

收稿日期:2011-10-28 修回日期:2012-04-27 出版日期:2012-04-01 发布日期:2012-04-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11104112), the National Foundation for Fostering Talents of Basic Science, China (Grant No. J1103202), the China Postdoctoral Science Foundation (Grant No. 20110491316), the National Undergraduate Innovation Foundation of China (Grant No. 2011A32045), and the Basic Scientific Research Foundation of Jilin University, China.

Dynamic control of retrieval contrast in a $\Lambda$-type atomic system

Zhang Xiao-Hang(张晓航)^a), Bao Qian-Qian(鲍倩倩)^a), Zhang Yan(张岩)^a), Su Ming-Che(苏铭彻)^b), Cui Cui-Li(崔淬砺)^a)†, and Wu Jin-Hui(吴金辉)^a)

a. College of Physics, Jilin University, Changchun 130012, China;
b. College of Computer Science and Technology, Jilin University, Changchun 130012, China

Received:2011-10-28 Revised:2012-04-27 Online:2012-04-01 Published:2012-04-01
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11104112), the National Foundation for Fostering Talents of Basic Science, China (Grant No. J1103202), the China Postdoctoral Science Foundation (Grant No. 20110491316), the National Undergraduate Innovation Foundation of China (Grant No. 2011A32045), and the Basic Scientific Research Foundation of Jilin University, China.

摘要/Abstract

摘要： We propose an efficient scheme for optimizing the optical memory of a sequence of signal light pulses in a system of ultracold atoms in Λ configuration. The memory procedure consists of write-in, storage, and retrieval phases. By applying a weak microwave field in the storage stage, additional phase-dependent terms are included, and the contrast of the output signal pulses can be dynamically controlled (enhanced or suppressed) through manipulating the relative phase φ between optical and microwave fields. Our numerical analysis shows that the contrast is enhanced to the most extent when φ=1.5π. In addition, the contrast is in proportion to the Rabi frequency of the microwave field with a certain relative phase.

关键词: electromagnetically induced transparency, optical memory, relative phase

Abstract: We propose an efficient scheme for optimizing the optical memory of a sequence of signal light pulses in a system of ultracold atoms in $\Lambda$ configuration. The memory procedure consists of write-in, storage, and retrieval phases. By applying a weak microwave field in the storage stage, additional phase-dependent terms are included, and the contrast of the output signal pulses can be dynamically controlled (enhanced or suppressed) through manipulating the relative phase φ between optical and microwave fields. Our numerical analysis shows that the contrast is enhanced to the most extent when φ=1.5π. In addition, the contrast is in proportion to the Rabi frequency of the microwave field with a certain relative phase.

Key words: electromagnetically induced transparency, optical memory, relative phase

中图分类号: (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

42.50.Gy

42.50.Ex (Optical implementations of quantum information processing and transfer) 32.80.Qk (Coherent control of atomic interactions with photons)

张晓航, 鲍倩倩, 张岩, 苏铭彻, 崔淬砺, 吴金辉. Dynamic control of retrieval contrast in a Λ-type atomic system[J]. 中国物理B, 2012, 21(5): 54209-054209.

Zhang Xiao-Hang(张晓航), Bao Qian-Qian(鲍倩倩), Zhang Yan(张岩), Su Ming-Che(苏铭彻), Cui Cui-Li(崔淬砺), and Wu Jin-Hui(吴金辉) . Dynamic control of retrieval contrast in a $\Lambda$-type atomic system[J]. Chin. Phys. B, 2012, 21(5): 54209-054209.

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Dynamic control of retrieval contrast in a Λ-type atomic system

Dynamic control of retrieval contrast in a $\Lambda$-type atomic system

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