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

Dynamic control of retrieval contrast in a Λ-type atomic system
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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 ∧ 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. We propose an efficient scheme for optimizing the optical memory of a sequence of signal light pulses in a system of ultracold atoms in ∧ 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.
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第5期274-278,共5页 中国物理B(英文版)
基金 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) the Basic Scientific Research Foundation of Jilin University,China
关键词 electromagnetically induced transparency optical memory relative phase electromagnetically induced transparency, optical memory, relative phase
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