Beam diffraction by a resistive half-plane

Abstract

The scattering of a Gaussian beam by a resistive half-screen is investigated. Far-field approximation is used in evaluation of geometrical optics and diffracted waves. The uniform expression of the diffracted waves by the resistive half-plane, which was found with the Sommerfeld-Maliuzhinets method, is obtained. The scattered fields for the case of the beam incidence are evaluated with the technique of a complex point source. The resultant wave expressions are examined numerically.

Beam modulation caused by the plasma scalds in the multilayer dielectric films

“…Even though the diffraction intensity in the Fresnel region can be enhanced dozens of times, the FFIM in the Fraunhofer region can recover gradually if the scalding depth is below a critical value. The preliminary experimental results are consistent with the theoretical prediction.Recently, beam modulation caused by the contamination particle [1], surface structure [2,3], and aperture [4][5][6][7] has attracted a great deal of researcher interest due to its great fundamental and practical importance. As a special case in the high-power laser facility such as SG-III in China [8], the beam modulated by the defects or structures on the surface of the optics may be harmful to the downstream optical components [9][10][11][12].…”

“…Recently, beam modulation caused by the contamination particle [1], surface structure [2,3], and aperture [4][5][6][7] has attracted a great deal of researcher interest due to its great fundamental and practical importance. As a special case in the high-power laser facility such as SG-III in China [8], the beam modulated by the defects or structures on the surface of the optics may be harmful to the downstream optical components [9][10][11][12].…”