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physics.optics2026
Orbital and spin current density backflow in unidirectional monochromatic electromagnetic fields in vacuum
Peeter Saari, Ioannis Besieris
In this study, energy backflow in the Poynting vector, as well as its orbital and spin current density components, has been examined for a 2-dimensional causal unidirectional vecto…
physics.optics2024★ 12 cited
Study of energy backflow in unidirectional monochromatic and space-time waves
Peeter Saari, Ioannis Besieris
Backflow, or retropropagation, is a counterintuitive phenomenon whereby for a forward-propagating wave the energy locally propagates backward. In the context of backflow, physicall…
physics.optics2024
Matters Arising: On physical nature of the optical deDroglie-Mackinnon wave packets. ARISING FROM Layton A. Hall and Ayman F. Abouraddy Nature Physics https://doi.org/10.1038/s41567-022-01876-6 (2023)
Peeter Saari, Ioannis M. Besieris
Hall and Abouraddy [1] have reported first experimental observation of optical de Broglie-Mackinnon wave packets, which is a seminal achievement in the study of so-called non-diffr…