Anomalous refraction of space-time wave packets

Murat Yessenov; Basanta Bhaduri; Ayman Abouraddy

doi:10.1117/12.2587826

12 April 2021 Anomalous refraction of space-time wave packets

Murat Yessenov, Basanta Bhaduri, Ayman Abouraddy

Proceedings Volume 11724, Laser Technology for Defense and Security XVI; 1172407 (2021) https://doi.org/10.1117/12.2587826
Event: SPIE Defense + Commercial Sensing, 2021, Online Only

Abstract

Refraction of an optical beam is a spatial phenomenon involving changes in the wave momentum while conserving energy. Although Snell’s law applies to monochromatic plane waves, its consequences are generally extended to a pulsed beam with an implicit assumption of separability of spatial and temporal degrees of freedom. Certain expectations are built into the law of refraction – that the speed of the transmitted light pulse is solely determined by the refractive index, hence independent of the angle of incidence to the interface. Here we show that introducing spatio-temporal correlation into a pulsed beam unveils a remarkable refractive phenomenon – tunable group velocity by varying angle of incidence. We present theoretical formulation as well as the experimental demonstration of this remarkable behavior by making use of 'space-time' wave-packets – propagation-invariant pulsed beam endowed with tight correlations between spatial and temporal frequencies.

Conference Presentation

Citation Download Citation

Murat Yessenov, Basanta Bhaduri, and Ayman Abouraddy "Anomalous refraction of space-time wave packets", Proc. SPIE 11724, Laser Technology for Defense and Security XVI, 1172407 (12 April 2021); https://doi.org/10.1117/12.2587826

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