We study the collision of two optical laser pulses in a pump-probe setup using beams with circular and elliptic cross section estimate number discernible signal photons induced by quantum vacuum nonlinearities. In this analysis we strategies to optimize from background driving lasers. One main results is that maximally focused lasers does not lead best signal. Instead, widening focus typically ...

Excitons confined to flat semiconductor quantum dots with elliptical cross section are considered as we study geometrical effects on exciton binding energy, electron-hole separation, and the resulting linear optical properties. We use numerical matrix diagonalization techniques with appropriately large and optimized basis sets in an effective-mass Hamiltonian approach. The linear optical suscep...

Abstract The approximated analytical approach of quasi-static theory (QST) is widely used in modelling the optical response plasmonic nanoparticles. It well known that its accuracy remarkable provided particle much smaller than wavelength interacting radiation and field induced inside structure approximately uniform. Here, we investigate limits QST range validity for gold nanostructures freesta...

A numerical technique is developed for the analysis of dissipative silencers of arbitrary, but axially uniform, cross section. Mean gas flow is included in a central airway that is separated from a bulk reacting porous material by a concentric perforate screen. The analysis begins by employing the finite element method to extract the eigenvalues and associated eigenvectors for a silencer of inf...

We study the development of shear bands in a thermally softening viscoplastic prismatic body of square cross-section and containing two symmetrically placed thin layers of a different viseoplastic material and two elliptical voids with their major axes aligned along the vertieM eentroidM axis of the cross-section. One tip of each elliptical void is abutting the common interface between the laye...

Vacuum fluctuations of quantum fields caused by the presence of boundaries produce changes in the zero-point energy, which give rise to the Casimir effect. Interest in quantum vacuum manifestations, including this phenomenon, has been propelled by new theoretical and experimental advances [1, 2, 3]. Hypothetical prospects of technological applications make even more desirable the knowledge of f...

The objective of the study is to analyze thermomechanical response a two-dimensional monodisperse granular system made thermoplastic polyurethane (TPU) cylinders with elliptical cross-section. Cyclic confined compression tests were performed while an infrared (IR) camera measured temperature changes at surface cylinders. Thermoelastic coupling and mechanical dissipation distinguished in thermal...

An asymmetric Abel inversion processing system was developed to establish a method for diagnosing arc plasma that has an elliptical cross section and is non-axisymmetric in the direction perpendicular observation during welding process. This applied tilted tungsten inert gas (TIG) As result, when this intensity distribution due integration, it confirmed relative error near central axis edge lar...

The backscattering cross section of cylindrical and elliptical disk-shaped scatterers was investigated in this study, utilising a new numerical solution method called the relaxed hierarchical equivalent source algorithm (RHESA). results were compared with similar cases, using analytical validation from literature. objective research to look into possibility replacing methods RHESA volume scatte...