Spacetime wave packets

A Spacetime wave packet is a spatial-temporal light structure with a one-to-one correlation between spatial and temporal frequencies.^[1] In particular, their group velocity in free space can be controlled arbitrarily from sub-luminal to super-luminal speeds without needing to control the dispersion of the medium it is propagating within.^[2] Their behavior under refraction does not follow the normal expectations given by Snell's law.^[3] Monochromatic Gaussian beam is shown to be transformed into spacetime wave packets under Lorentz transformation, thus any monochromatic Gaussian beam observed in a reference frame moving at relativistic velocity appears as spacetime wave packets.^[4]^[5]

References

^ Kondakci, H. Esat; Abouraddy, Ayman F. (November 2017). "Diffraction-free space–time light sheets". Nature Photonics. 11 (11): 733–740. arXiv:1707.03931. Bibcode:2017NaPho..11..733K. doi:10.1038/s41566-017-0028-9. ISSN 1749-4893. S2CID 54593510.
^ Kondakci, H. Esat; Abouraddy, Ayman F. (2019-02-25). "Optical space-time wave packets having arbitrary group velocities in free space". Nature Communications. 10 (1): 929. Bibcode:2019NatCo..10..929K. doi:10.1038/s41467-019-08735-8. ISSN 2041-1723. PMC 6389885. PMID 30804333.
^ Bhaduri, Basanta; Yessenov, Murat; Abouraddy, Ayman F. (July 2020). "Anomalous refraction of optical spacetime wave packets". Nature Photonics. 14 (7): 416–421. arXiv:1912.13341. Bibcode:2020NaPho..14..416B. doi:10.1038/s41566-020-0645-6. ISSN 1749-4893. S2CID 209515768.
^ Bélanger, P. A. (1986-04-01). "Lorentz transformation of packetlike solutions of the homogeneous-wave equation". JOSA A. 3 (4): 541–542. Bibcode:1986JOSAA...3..541B. doi:10.1364/JOSAA.3.000541. ISSN 1520-8532.
^ Kondakci, H. Esat; Abouraddy, Ayman F. (2018-04-16). "Airy Wave Packets Accelerating in Space-Time". Physical Review Letters. 120 (16): 163901. arXiv:1711.00387. Bibcode:2018PhRvL.120p3901K. doi:10.1103/PhysRevLett.120.163901. PMID 29756946.

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[1] Kondakci, H. Esat; Abouraddy, Ayman F. (November 2017). "Diffraction-free space–time light sheets". Nature Photonics. 11 (11): 733–740. arXiv:1707.03931. Bibcode:2017NaPho..11..733K. doi:10.1038/s41566-017-0028-9. ISSN 1749-4893. S2CID 54593510.

[2] Kondakci, H. Esat; Abouraddy, Ayman F. (2019-02-25). "Optical space-time wave packets having arbitrary group velocities in free space". Nature Communications. 10 (1): 929. Bibcode:2019NatCo..10..929K. doi:10.1038/s41467-019-08735-8. ISSN 2041-1723. PMC 6389885. PMID 30804333.

[3] Bhaduri, Basanta; Yessenov, Murat; Abouraddy, Ayman F. (July 2020). "Anomalous refraction of optical spacetime wave packets". Nature Photonics. 14 (7): 416–421. arXiv:1912.13341. Bibcode:2020NaPho..14..416B. doi:10.1038/s41566-020-0645-6. ISSN 1749-4893. S2CID 209515768.

[4] Bélanger, P. A. (1986-04-01). "Lorentz transformation of packetlike solutions of the homogeneous-wave equation". JOSA A. 3 (4): 541–542. Bibcode:1986JOSAA...3..541B. doi:10.1364/JOSAA.3.000541. ISSN 1520-8532.

[5] Kondakci, H. Esat; Abouraddy, Ayman F. (2018-04-16). "Airy Wave Packets Accelerating in Space-Time". Physical Review Letters. 120 (16): 163901. arXiv:1711.00387. Bibcode:2018PhRvL.120p3901K. doi:10.1103/PhysRevLett.120.163901. PMID 29756946.

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