Multiresonances of quasi-trapped modes in metasurfaces based on nanoparticles of transition metal dichalcogenides

The features of polarization control of multiple multiresonances for quasi-trapped modes excited by synchronization of bianisotropic dipole responses in MoS$_2$ disks with a hole are considered. Using the numerical calculations with analytical multipole analysis, we showed that the presence of a strong optical anisotropy of MoS$_2$ nanoparticles provides an additional degree of freedom and allows to observe several resonances of electric and magnetic dipoles at once in a narrow spectral range. Based on the simulation results, we obtained the frequency dependences for the dipole polarizabilities of the MoS$_2$ disk with a hole, which allow one to distinguish the contributions of the nonlocal and bianisotropic dipole responses and possessing several features in the near infrared range. Using the polarizability spectra of single nanoparticles and applying the tuning strategy, the design of the MoS$_2$ metasurface supporting three resonances of quasi-trapped modes at once in a narrow spectral range was developed. One of these resonances corresponds to the telecom wavelength of 1550 nm. The spectrum of light reflection for MoS$_2$ metasurface is characterized by three narrowband dips corresponding to the wavelengths of the quasi-trapped modes. It was shown that a change in the polarization of a wave normally incident on the metasurface to orthogonal one leads to a change in the type of bianisotropic response excited in each MoS$_2$ disk and to the excitation of three other features in the reflection spectra of the metasurface at wavelengths close to the initial values.Comment: 8 pages, 5 figure

The Features of Surface Plasmon-Polariton Pulses Generation Via Cooperative Effects in Waveguide Spaser

The problem of sub-picosecond plasmon-polariton pulse formation in metal/dielectric interface due to collective decay of excited quantum dots, placed in the dielectric layer near the metal surface, is considered. Theoretical approach to selection of semiconductor quantum dots and dielectric host medium to increase the energy transmission of quantum dot collective excitations into surface plasmon-polariton modes of waveguide spaser is developed

ОСОБЕННОСТИ ЛИЧНОСТНОГО АДАПТАЦИОННОГО ПОТЕНЦИАЛА У ЛИЦ СРЕДНЕГО ВОЗРАСТА В УСЛОВИЯХ СОЦИАЛЬНОЙ ИЗОЛЯЦИИ, СОВЕРШИВШИХ ПРЕСТУПЛЕНИЕ ПРОТИВ ЛИЧНОСТИ

The article discusses theoretical and applied issues of studying the adaptive potential of middle-aged people who are in conditions of social isolation. В статье рассматриваются теоретические и прикладные вопросы изучения адаптационного потенциала у лиц среднего возраста, находящихся в условиях социальной изоляции.