Continuous motion of interference patterns using the angular Doppler effect

L. Paterson, M. P. MacDonald, J. Arlt, W. Sibbett, K. Dholakia, K. Volke-Sepulveda

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


We demonstrate the use of the angular Doppler effect to obtain continuous motion of interference patterns. A small frequency shift between two beams can create such a moving pattern. By rotating a half wave plate in one arm of an interferometer, frequency shifts in the optical domain from less than 1 Hertz to kHz are achieved. We apply moving interference patterns in an optical tweezers set-up to enable controlled and continuous motion of optically trapped particles and structures.


  • Doppler effect
  • Interference
  • Pattern

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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