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Science Newsletter of the Faculty fo Physics
This is a new bulletin, which, as we hope, will bring fresh, updated information on scientific news, research activities, and related events in the life of our department to our staff members, undegraduate and graduate students, postdocs, collaborators and partners. We greatly hope that this Science Newsletter will help us to find new partners in research and shorten the way from fundamental research to applications and innovations, from our fundamental discoveries to their successful implementations in not too distant future.
XIV National School-Seminar "Wave phenomena in inhomogeneous media"
The conference papers from the School-Seminar «Waves-2014» will be submitted for publishing in the Memoirs of the Faculty of Physics journal.
2014 / 1
R e g u l a r p a p e r s
Theoretical and mathematical physics
Yu.V. Grats
Show Abstract
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. Hide Abstract
Optics and spectroscopy. Laser physics
V. V. Zubyuk, A. I. Musorin, P. P. Vabishchevich, M. R. Shcherbakov, M. I. Sharipova, A. S. Shorokhov, T. V. Dolgova, A. A. Fedyanin
Show Abstract
Changes 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. Hide Abstract
V.O. Bessonov, I.V. Soboleva, B.I. Afinogenov, D.N. Gulkin, D.A. Shilkin, A.T. Le, and A.A. Fedyanin
Show Abstract
Hybrid 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. Hide Abstract
Condensed matter physics
A.V. Limanskaya
Show Abstract
In 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 . Hide Abstract
