It is shown that in the Furry representation matrix element for a graviton emission by an electron in the field of a plane electromagnetic wave is proportional to the matrix element for the emission of a photon. The proportionality coefficient is a pure classical and depends on the direction of graviton propagation only. Possibility to transfer the results for the case of an arbitrary external electromagnetic field is discussed.
Show AbstractChanges in the temporal profile of the electromagnetic field of a femtosecond pulse at the resonant excitation of plasmon-polaritons (PP) in the vicinity of the band gap edges of plasmonic crystal were demonstrated using the frequency-resolving optical gating (FROG) technique. It is shown that the broadening of the p-polarized pulse reflected from the plasmonic crystal is 20% more than in the case of s-polarized light in the vicinity of band gap edges where the lifetime of plasmon-polaritons is highest. The spectrum of the reflected pulse is significantly modified because of the resonant excitation of the PP in the crystal — the intensity decreases near the wavelengths corresponding to the band gap edges.
Show AbstractHybrid mode of Tamm plasmon-polariton and surface plasmon-polariton in 1D photonic crystal/semitransparent metal film is experimentally observed. The hybrid state is excited under conditions of total internal reflection for TM-polarized light. Spectral and angular dependences of the hybrid mode resonances positions are studied in the Kretschmann geometry by the methods of frequency-angular spectroscopy. Coupling between Tamm and surface plasmon-polaritons leads to repulsion of their dispersion curves controlled by metal film thickness. Experimental results are in a good agreement with the numerical calculations.
Show AbstractIn the Stokes approximation the photophoretic motion of large solid aerosol spherical particle is described theoretically. By consideration of the motion assumed that average temperature of the particle surface significantly differs from the temperature of gaseous medium. During solution process of gas-dynamic equations analytical expressions for the force and velocity of photophoresis obtained taken into account the dependence of gaseous medium density and viscosity and heat conduction on temperature .
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