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Grodno, Belarus

Klimov V.V.,National Research Nuclear University MEPhI | Zabkov I.V.,Moscow Institute of Physics and Technology | Pavlov A.A.,RAS Lebedev Physical Institute | Guzatov D.V.,Kupala State University
Optics Express

Eigenmodes of a chiral sphere placed in a dielectric medium were investigated in details. Excitation of these eigenmodes by a plane wave and a chiral molecule radiation was studied both analytically and numerically. It was found that decay rates of "right" and "left" enantiomers are different in the presence of the chiral sphere. Strong dependence of radiation pattern of the chiral molecule placed in the vicinity of the chiral sphere on chirality strength was also demonstrated. An interesting correlation between chirality of sphere and spatial spirality (helicity, vorticity⋯) of the electromagnetic fields in the presence of chiral sphere was observed for the first time. © 2014 Optical Society of America. Source

Guzatov D.V.,Kupala State University | Klimov V.V.,Russian Academy of Sciences
Quantum Electronics

Cross sections of scattering, absorption, and light pressure for a chiral spherical particle in a circularly polarised light field are studied for different values of the radius, dielectric constant, permeability, and parameter of the chiral particle. The conditions are found under which the cross sections of absorption and light pressure differ significantly when nanoparticles are exposed to light with different polarisations, which can be used to improve synthesis of chiral nanoparticles of complex structure. © 2011 Kvantovaya Elektronika and Turpion Ltd. Source

Lyalikov A.M.,Kupala State University
Technical Physics Letters

A possibility of combining measurement and testing procedures in interference studies of phase objects is shown for the first time. The possibility of forming several independent interferograms corresponding to the regions of measuring and testing parameter in one interference pattern has been theoretically substantiated and experimentally confirmed for a certain class of phase objects. © 2013 Pleiades Publishing, Ltd. Source

A possibility of distinguishing information on defects of a substrate and of a periodical microstructure upon their visualization for a composite diffraction element is substantiated. It has been shown for the first time that, for such a diffraction element, it is possible to distinguish separately reflections from macroscopic defects of the substrate and from the diffraction microstructure itself in the interference patterns, using a two-beam interferometer complemented by an optical system of spatial filtration. © 2015, Pleiades Publishing, Ltd. Source

Temnov V.V.,Massachusetts Institute of Technology | Armelles G.,Institute Microelectronica Of Madrid Imm Cnm Csic | Woggon U.,TU Berlin | Guzatov D.,Kupala State University | And 6 more authors.
Nature Photonics

Surface-plasmon-mediated confinement of optical fields holds great promise for on-chip miniaturization of all-optical circuits. Following successful demonstrations of passive nanoplasmonic devices, active plasmonic systems have been designed to control plasmon propagation. This goal has been achieved either by coupling plasmons to optically active materials or by making use of transient optical nonlinearities in metals via strong excitation with ultrashort laser pulses. Here, we present a new concept in which the active optical component is a metal-ferromagnet-metal structure. It is based on active magneto-plasmonic microinterferometry, where the surface plasmon wave vector in a gold-ferromagnet-gold trilayer system is controlled using a weak external magnetic field. Application of this new technique allows measurement of the electromagnetic field distribution inside a metal at optical frequencies and with nanometre depth resolution. Significant modulation depth combined with possible all-optical magnetization reversal induced by femtosecond light pulses opens a route to ultrafast magneto-plasmonic switching. © 2010 Macmillan Publishers Limited. All rights reserved. Source

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