Demonstration of spatial-light-modulation-based four-wave mixing in cold atoms

Jz-Yuan Juo, Jia-Kang Lin, Chin-Yao Cheng, Zi-Yu Liu, Ite A. Yu, and Yong-Fan Chen
Phys. Rev. A 97, 053815 – Published 14 May 2018

Abstract

Long-distance quantum optical communications usually require efficient wave-mixing processes to convert the wavelengths of single photons. Many quantum applications based on electromagnetically induced transparency (EIT) have been proposed and demonstrated at the single-photon level, such as quantum memories, all-optical transistors, and cross-phase modulations. However, EIT-based four-wave mixing (FWM) in a resonant double-Λ configuration has a maximum conversion efficiency (CE) of 25% because of absorptive loss due to spontaneous emission. An improved scheme using spatially modulated intensities of two control fields has been theoretically proposed to overcome this conversion limit. In this study, we first demonstrate wavelength conversion from 780 to 795 nm with a 43% CE by using this scheme at an optical density (OD) of 19 in cold Rb87 atoms. According to the theoretical model, the CE in the proposed scheme can further increase to 96% at an OD of 240 under ideal conditions, thereby attaining an identical CE to that of the previous nonresonant double-Λ scheme at half the OD. This spatial-light-modulation-based FWM scheme can achieve a near-unity CE, thus providing an easy method of implementing an efficient quantum wavelength converter for all-optical quantum information processing.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 16 March 2018

DOI:https://doi.org/10.1103/PhysRevA.97.053815

©2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Jz-Yuan Juo1, Jia-Kang Lin1, Chin-Yao Cheng1, Zi-Yu Liu1, Ite A. Yu2,3, and Yong-Fan Chen1,3,*

  • 1Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan
  • 2Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
  • 3Center for Quantum Technology, Hsinchu 30013, Taiwan

  • *yfchen@mail.ncku.edu.tw

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 97, Iss. 5 — May 2018

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×