Large Fizeau's light-dragging effect in a moving electromagnetically induced transparent medium

Pei Chen Kuan, Chang Huang, Wei Sheng Chan, Sandoko Kosen, Shau Yu Lan

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


As one of the most influential experiments on the development of modern macroscopic theory from Newtonian mechanics to Einstein's special theory of relativity, the phenomenon of light dragging in a moving medium has been discussed and observed extensively in different types of systems. To have a significant dragging effect, the long duration of light travelling in the medium is preferred. Here we demonstrate a light-dragging experiment in an electromagnetically induced transparent cold atomic ensemble and enhance the dragging effect by at least three orders of magnitude compared with the previous experiments. With a large enhancement of the dragging effect, we realize an atom-based velocimeter that has a sensitivity two orders of magnitude higher than the velocity width of the atomic medium used. Such a demonstration could pave the way for motional sensing using the collective state of atoms in a room temperature vapour cell or solid state material.

Original languageEnglish
Article number13030
JournalNature communications
Publication statusPublished - 2016 Oct 3

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)


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