Efficient Non-Resonant Absorption in Thin Cylindrical Targets: Experimental Evidence for Longitudinal Geometry

TL;DR

This paper experimentally demonstrates significant electromagnetic absorption in thin conducting cylinders aligned with the beam, revealing a new physical effect with potential applications in laser media and atmospheric channels.

Contribution

It provides experimental evidence for non-resonant absorption in thin cylindrical targets with longitudinal geometry, a phenomenon not previously confirmed.

Findings

Significant absorption observed in experiments

Absorption occurs in cylinders much thinner than the beam waist

Potential applications in laser pumping and atmospheric channel creation

Abstract

Experiments provide a qualitative confirmation of significant absorption of a wide electromagnetic beam propagating along a thin conducting cylinder (the diameter of the cylinder can be orders of magnitude less than the beam waist width). This new physical effect can be used for numerous applications, such as pumping of active media of short-wavelength lasers and creation of low-density channels in the lower atmosphere.