All-Optical Beam Steering Using the Polariton Lighthouse Effect

Samuel M.H. Luk, Hadrien Vergnet, Ombline Lafont, Przemyslaw Lewandowski, Nai H. Kwong, Elisabeth Galopin, Aristide Lemaitre, Philippe Roussignol, Jérôme Tignon, Stefan Schumacher, Rolf Binder, Emmanuel Baudin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We demonstrate theoretically and experimentally that a specifically designed microcavity driven in the optical parametric oscillation regime exhibits lighthouse-like emission, that is, an emission focused around a single direction. Remarkably, the emission direction of this microlighthouse is continuously controlled by the linear polarization of the incident laser, and angular beam steering over 360° is demonstrated. Theoretically, this effect arises from the interplay between the nonlinear optical response of microcavity exciton-polaritons, the difference in the subcavities forming the microcavity, and the rotational invariance of the device.

Original languageEnglish (US)
Pages (from-to)449-454
Number of pages6
JournalACS Photonics
Issue number2
StatePublished - Feb 17 2021


  • all-optical signal processing
  • nonlinear optics
  • polaritons
  • semiconductor microcavity

ASJC Scopus subject areas

  • Biotechnology
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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