88% conversion efficiency with an atomic spin wave mediated mode selection

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

5 Scopus Citations
View graph of relations

Author(s)

  • Jinxian Guo
  • L. Q. Chen
  • Peiyu Yang
  • Zhengjun Li
  • Yuan Wu
  • Xiaotian Feng
  • Chun-Hua Yuan
  • Weiping Zhang

Detail(s)

Original languageEnglish
Pages (from-to)1752-1755
Journal / PublicationOptics Letters
Volume42
Issue number9
Publication statusPublished - 1 May 2017
Externally publishedYes

Abstract

In studying quantum correlation and quantum memory of continuous variables of light fields and atoms, a crucial step is the retrieval of the quantum fields by converting an atomic spin wave to light, and retrieval efficiency is a crucial parameter. In this Letter, we implement a double-pass Raman scheme in 87Rb by incorporating coherent feedback. We find that the transfer efficiency from an atomic spin wave, which is generated from a Raman process in a high gain regime, to light fields is enhanced by the double-pass scheme as compared to the commonly used single-pass scheme. An atomic spin wave as high as 88% is read out, limited only by decoherence of the atomic spin waves. Our analysis shows that the enhancement effect is because a double-pass scheme introduced the coherent feedback mechanism which selectsthe spatial mode of an atomic spin wave via the correlated optical field and enhances the coupling efficiency between the atom and light. The correlations between the write-in and readout signals generated in such a two-pass Raman process are also better than the single-pass case. We believe such a two-pass scheme with feedback mechanism should be useful for studying continuous variables in quantum systems.

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

88% conversion efficiency with an atomic spin wave mediated mode selection. / Guo, Jinxian; Chen, L. Q.; Yang, Peiyu et al.

In: Optics Letters, Vol. 42, No. 9, 01.05.2017, p. 1752-1755.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review