A new electron acceleration mechanism is identified that develops when a relativistically intense laser irradiates the wedge of an over-dense plasma. This induces diffracted electromagnetic wave with significant longitudinal electric field accelerates electrons from plasma over long distances to relativistic energies. Well collimated, highly-charged (nC) bunches energies up 100's MeV are obtain...

Angular-resolved reflection measurements suggest that higher-order Miller-index crystal planes of a fcc photonic crystal reflect specularly about the normal to the 111 planes. We suggest that this phenomenon results from a two-step diffraction process where light is first Bragg diffracted by higher-order Miller-index crystal planes and is then two-dimensionally diffracted by periodicities withi...

An offshore structural design should accurately calculate wave loads and responses acting on slender cylinders. The hydrodynamic drag-dominated force was always challenging, hence the loading became a complex solution; it led to nonlinear relation between caused by diffracted radiated waves, which included in Morison’s equation. For more consistency assessment, linearised drag–inertia considere...

Abstract. The gravitational lensing of gravitational waves should be treated in the wave optics instead of the geometrical optics when the wave length λ of the gravitational waves is larger than the Schwarzschild radius of the lens mass M. The wave optics is based on the diffraction integral which represents the amplification of the wave amplitude by lensing. We study the asymptotic expansion o...

A broadband and sensitive time-resolved terahertz (THz) configuration relying on noncollinear optical interactions is presented. This scheme enables a higher THz generation detection efficiency in nonlinear crystals. The concept relies pair of thick (2 mm) GaP crystals with phase grating etched their surface to achieve matching between diffracted near-infrared pulse wave propagating at normal i...

The magneto-optical properties of Co microsquare—2 mm edge—arrays have been investigated for different interelement separations, from 0.2 to 2.0 mm. The magneto-optical response is measured both at reflected and diffracted beams, and it is compared with the results of a model that uses micromagnetic simulations and optical diffraction theory to calculate the magneto-optical response for differe...

The current near a right-angled comer on a perfectly conducting flat scatterer illuminated by a plane wave is expressed as a sum of three currents. The first is the physical optics (PO) current, which describes the surface effect. The second is the fringe wave (FW) current, which is found from the half-plane solution and accounts for the distortion of the current caused by the edges. The third ...

A novel variable optical attenuator device is proposed and some of the potential application is pointed out. It relies on a double acousto optic modulator set up and allows one to attain dynamic range as high as 60 dB. Such feature steams out of the well known modeling of acousto optic devices, mostly based on the coupled wave analysis. Furthermore, is shown that the proposed device may exhibit...

In the past several years photorefractive materials have been proposed for use as photorefractive incoherent-to-coherent optical converters (PICOC's) because of their dynamic real-time grating recording properties.'5 In a general PICOC, the imagebearing incoherent light is used to erase the grating, which is constructed by two coherent writing beams. The output image is carried by the diffracte...