Optical space-time wave packets having arbitrary group velocities in free space

Nature Communications
H Esat Kondakci, Ayman F Abouraddy

Abstract

Controlling the group velocity of an optical pulse typically requires traversing a material or structure whose dispersion is judiciously crafted. Alternatively, the group velocity can be modified in free space by spatially structuring the beam profile, but the realizable deviation from the speed of light in vacuum is small. Here we demonstrate precise and versatile control over the group velocity of a propagation-invariant optical wave packet in free space through sculpting its spatio-temporal spectrum. By jointly modulating the spatial and temporal degrees of freedom, arbitrary group velocities are unambiguously observed in free space above or below the speed of light in vacuum, whether in the forward direction propagating away from the source or even traveling backwards towards it.

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Citations

Apr 16, 2019·Optics Letters·Basanta BhaduriAyman F Abouraddy
Nov 2, 2019·Optics Letters·Murat Yessenov, Ayman F Abouraddy
Apr 3, 2020·Optics Letters·Abbas ShiriAyman F Abouraddy
Jul 15, 2020·Scientific Reports·Zhaoyang Li, Junji Kawanaka
Dec 5, 2019·Scientific Reports·N I Petrov
Mar 4, 2020·Optics Express·Spencer W JollyFabien Quéré
Sep 10, 2020·Applied Optics·José Agustín Moreno-LariosJesús Garduño-Mejía
Dec 10, 2020·Nature Communications·Abbas ShiriAyman F Abouraddy
Nov 15, 2020·Nature Communications·Murat YessenovAyman F Abouraddy
Dec 19, 2020·Physical Review Letters·Murat Yessenov, Ayman F Abouraddy
Jan 8, 2021·Physical Review Letters·Murat YessenovAyman F Abouraddy
Jan 30, 2021·Physical Review Letters·Bertrand Kibler, Pierre Béjot
May 15, 2021·Optics Letters·Alyssa M Allende MotzAyman F Abouraddy
Jul 2, 2021·Optics Letters·Layton A HallAyman F Abouraddy
Aug 4, 2021·Light, Science & Applications·Cheng GuoShanhui Fan
Jan 13, 2021··Murat Yessenov, Ayman F. Abouraddy
Jan 13, 2021··Murat YessenovBasanta Bhaduri
Jan 13, 2021··Layton A. HallMurat Yessenov
Nov 26, 2019··Ayman F. Abouraddy, Ayman F. Abouraddy
Sep 11, 2020··Ayman F. AbouraddyMurat Yessenov
Sep 11, 2020··Basanta BhaduriMurat Yessenov
Oct 1, 2019··Ayman F. AbouraddyBasanta Bhaduri
Sep 15, 2020··Ayman F. AbouraddyPeter J. Delfyett

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