Slow and Fast Light through Weak Measurements of Spectral Superoscillations

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 va...

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Bibliographic Details
Published in:Laser & photonics reviews 2021-10, Vol.15 (10), p.n/a
Main Authors: Zacharias, Thomas, Hareli, Liran, Bahabad, Alon
Format: Article
Language:English
Subjects:
Dispersion
fast light
Light
Light speed
slow light
superoscillations
ultrafast optics
weak measurements
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Summary: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. Current methods to achieve slow and fast light are based on strong dispersion attainable in resonant systems. By conducting weak measurements on spectrally superoscillating pulses, an alternative route for achieving slow and fast light is experimentally demonstrated that can be applicable to any medium and system where light is propagating.
ISSN:1863-8880
1863-8899
DOI:10.1002/lpor.202100151