arXiv subjects

V. P. Drachev

Publications and source records attributed to V. P. Drachev.

4 recordsLinked to original sources

arXiv2020

Propagation of Strongly Hybridized Edge Modes in Plasmonic Waveguides

In our work we investigate the propagation of optical modes in nanoscale hybrid plasmonic waveguides. Frequency domain Maxwell equations based simulations are implemented to study properties of mixed modes in 3D. The results of our analysis are applied to design an advanced hybrid waveguide with useful characteristics. It is demonstrated here how to couple two edge plasmons with a waveguide mode to form a hybrid waveguide well tuned for applications in the field of electro-optical transistors (modulators). A mixed polarization state of edge plasmons allows them to couple with a horizontally polarized (TE) optical mode (which is not possible for usual surface plasmons) and open the way to polarization independent plasmonic modulators.

physics.optics↗

arXiv2005

Enhancement and suppression of surface plasmon resonance in Ag aggregate by optical gain and absorption in surrounding dielectric medium

We have observed the compensation of loss in metal by gain in interfacing dielectric in the mixture of aggregated silver nanoparticles and rhodamine 6G dye. The demonstrated six-fold enhancement of the Rayleigh scattering is the evidence of the increase of the quality factor of the surface plasmon (SP) resonance. The reported experimental observation paves the road to many practical applications of nanoplasmonics. We have also predicted and experimentally observed a suppression of the surface SP resonance in metallic nanoparticles embedded in a dielectric host with absorption.

physics.optics↗

arXiv2005

Negative Refractive Index in Optics of Metal-Dielectric Composites

Specially designed metal-dielectric composites can have a negative refractive index in the optical range. Specifically, it is shown that arrays of single and paired nanorods can provide such negative refraction. For pairs of metal rods, a negative refractive index has been observed at 1.5 micrometer. The inverted structure of paired voids in metal films may also exhibit a negative refractive index. A similar effect can be accomplished with metal strips in which the refractive index can reach -2. The refractive index retrieval procedure and the critical role of light phases in determining the refractive index is discussed.

physics.optics↗

arXiv1998

Nonlinear phase shift without cascaded second-order processes and third order nonlinearity

The new mechanism for obtaining a nonlinear phase shift has been proposed and the schemes are described for its implementation. As it is shown, the interference of two waves with intensity-dependent amplitude ratio coming from the second harmonic generation should produce the nonlinear phase shift. The sign and amount of nonlinear distortion of a beam wavefront is dependent of the relative phase of the waves that is introduced by the phase element. Calculated value of $n_2^{eff}$ exceeds that connected with cascaded quadratic nonlinearity, at the same conditions.

physics.optics↗