Efficient non-resonant absorption of electromagnetic radiation in thin cylindrical targets: experimental evidence

Abstract

A theoretical possibility of non-resonant, fast, and efficient (up to 40 percent) heating of very thin conducting cylindrical targets by broad electromagnetic beams was predicted in [Akhmeteli, arXiv:physics/0405091 and 0611169] based on rigorous solution of the diffraction problem. The diameter of the cylinder can be orders of magnitude smaller than the wavelength (for the transverse geometry) or the beam waist (for the longitudinal geometry) of the electromagnetic radiation. Experimental confirmation of the above results is presented [Akhmeteli, Kokodiy, Safronov, Balkashin, Priz, Tarasevitch, arXiv:1109.1626 and 1208.

Thermal processes in thin wires by interaction with microwave radiation

“…Calculations by this formula using expression (4) for the temperature distribution along the fiber give such a resistance value of the "hot" fiber: R = 31125 Ohm.…”

“…It was shown in works [1][2][3][4] that electromagnetic radiation in the microwave range can be strongly absorbed in metallic wires or other thin conducting fibers, whose diameter is much smaller than the wavelength.…”

Interaction between thin conductive fibers and microwave radiation

“…In papers (Akhmeteli et al 2013;Akhmeteli et al 2015;Kokodii et al 2017) described are cases when the wire is located along the radiation beam axis: the effect of strong absorption of radiation by the wire is also observed. The paper (Shi He et al 2011) describes an experiment, where the wire is located in the waveguide.…”

Thermal processes in thin wires by interaction with microwave radiation

“…It was shown in works [1][2][3][4] that electromagnetic radiation in the microwave range can be strongly absorbed in metallic wires or other thin conducting fibers, whose diameter is much smaller than the wavelength. Focusing radiation is not necessary.…”