99 citations · 306 across the 11 of their papers we have counts for
13 papers
Energy backflow in unidirectional spatiotemporally localized wavepackets
Ioannis Besieris, Peeter Saari
Backflow, or retro-propagation, is a counterintuitive phenomenon where for a forward-propagating wave the energy or probability density locally propagates backward. In this study t…
Backward energy flow in simple 4-wave electromagnetic fields
Peeter Saari, Ioannis Besieris
Electromagnetic energy backflow is a phenomenon occurring in regions where the direction of the Poynting vector is opposite to that of the propagation of the wave field. It is part…
Relativistic aberration and null Doppler shift within the framework of superluminal and subluminal nondiffracting waves
Peeter Saari, Ioannis M. Besieris
The relativistic aberration of a wavevector and the corresponding Doppler shift are examined in connection with superluminal and subluminal spatiotemporally localized pulsed optica…
Reactive energy in non-diffracting localized waves
Peeter Saari, Ioannis Besieris
It is well known that although the group velocity of structured light pulses propagating in vacuum can be subluminal or superluminal, the upper limit of the energy flow velocity is…
Reexamination of energy flow velocities of non-diffracting localized waves
Peeter Saari, Ott Rebane, Ioannis Besieris
A universal relation has been established between the local energy transport velocity along the direction of propagation and the group velocity of scalar and vector-valued propagat…
White-light hyperbolic Airy beams
Andreas Valdmann, Peeter Piksarv, Heli Valtna-Lukner +1
Ultra-broadband hyperbolic Airy beams are experimentally realized and spatio-temporally characterized. Transmissive (refractive) and reflective cubic phase elements were used to im…