Past, present, and future studies on the longitudinal electric field components of light
(Submitted on 21 August 2020, Uploaded on 21 August 2020)
keywords: dressed photon, spatio-temporal vortex hydrodynamics, quantum probability, quantum walk, quantum measurement
Unlike a planar lightwave, a tightly focused light beam has longitudinal components of the electric field (LCEF) that are polarized along the propagation direction. This article reviews the past and present status of theoretical and experimental studies on the LCEF. By pointing out that the LCEF is an essential constituent element of the dressed photon (DP), the future outlook of these studies for advancing DP science and its applications is discussed.
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