Slow and Fast Light through Weak Measurements of Spectral Superoscillations

Thomas Zacharias, Liran Hareli, Alon Bahabad*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Slow and fast light are light pulses moving at group velocities slower or faster than the speed of light in vacuum. Current methods to achieve slow and fast light are based on strong dispersion attainable in resonant systems. By defining slow and fast light based on the arrival of the expectation value of the pulse in time, an alternative route for achieving slow and fast light is experimentally demonstrated where no dispersion engineering is needed and thus can be applicable to any medium and system where light is propagating. The method is based on the phenomenon of superoscillations and entails a weak measurement of the arrival time of a light pulse. The findings can be useful for applications in telecommunication, interferometry, and laser radars.

Original languageEnglish
Article number2100151
JournalLaser and Photonics Reviews
Issue number10
StatePublished - Oct 2021


  • fast light
  • slow light
  • superoscillations
  • ultrafast optics
  • weak measurements


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