A Surface Plasmon Microcavity Between the Toroidal and Flat Metallic Surfaces

We consider the formation of the surface plasmon polariton (SPP) mode in the structure with a metallic torus and a metallic flat surface separated by a dielectric medium. The energy of the wave field is mainly concentrated in the dielectric medium at the vicinity of the minimum thickness of the gap between the metallic surfaces. The dependence of the resonant frequency on parameters of the structure was determined. The strongly localized SPP mode in the transverse direction contributes to the increase in the Purcell factor that is crucial for enhancement of the spontaneous emission rate.     

The Periodically Graded Metal–Insulator–Metal Gap Structure for Plasmonic Waveguides

In this paper, we explore the potential of the plasmonic metal–insulator–metal (MIM) periodically graded structure. Based on the coupled modes approach, an analytical model has been observed for the surface plasmon polariton (SPP) propagation. The band modes of SPP can be also supported by the MIM structure and we have analyzed the strong dependence of band width on structure parameters. The obtained analytical expressions allow one to easily choose the structure parameters for the desired band width.     

Contribution of Nuclear Membrane Phospholipids to the Formation of Electrokinetic Potential

Biophysics - The electrokinetic potential of isolated cell nuclei obtained from wheat seedlings irradiated with nonionizing electromagnetic radiation of extremely high frequencies has been studied....     

Generation of Narrowband Tunable THz-Radiation via Optical Rectification in Periodically Poled Materials

The generation of tunableTHz-radiation via optical rectification offs-pulses in periodically poled nonlinearmaterials is reported and its applicationfor biomedical sensing using THz-senorsbased on planar wave guides is discussed indetail.     

Terahertz Surface Plasmon-Polariton Superfocusing in Coaxial Cone Semiconductor Structures

It is shown that in coaxial cone semiconductor structures, the strong localization of surface plasmon polariton (SPP) is possible in terahertz wave regions. During the propagation through this structure, the SPP acquires the following peculiarities: its wavelength essentially decreases and the diffraction processes do not hinder its localization in very small regions; the wave fields noticeably increase. The dissipative processes are also essential, and, having a noticeable role in terahertz regions, do not hinder the strong localization of the SPP. On the basis of such structure, it is possible to create a scanning THz microscope with the resolution equal to a few microns.