Research laboratory

"Physics of wave processes"

 

Activities:

 

  • Electrodynamics of artificial anisotropic structures.
  • Development of new designs, functionalities, and electromagnetic properties for off-resonance transparent metasurfaces from the microwave to infra-red spectral ranges.
  • Theoretical, numerical, and experimental studies of the electromagnetic wave interactions with bi-anisotropic structures.
  • Acoustic waves in environments with artificial anisotropy.

The direction of researches corresponds to item 0602 ("new optical, fiber-optical and nonlinear and optical components, materials and the coverings, new materials for devices functional micro, opto-, nano- and microwave electronic engineers") the list of the priority directions of basic and applied scientific researches of Republic of Belarus for 2011-2015 (No. 585 is approved by the Resolution of Council of ministers of Republic of Belarus of 19.04.2010).

 

Goals and objectives for the long-term prospect:

 

1. We are focused on the financed fundamental, applied and research work of topics in accordance with the scientific priority of the Republic of Belarus and the world tendency.

2. Using obtained high-level scientific results, our group is carried out the assistance and organization to introduce these results in the manufacturing and learning processes in the interested companies and academic institutes.

3. The preparation of the excellent scientific brain-powers and increasing of scientific qualification on the Faculty of Physics and Information Technology by the wide participation of undergraduate students, master, and Ph.D. students in the research work.

4. Carrying out of patent and information studies on the protectable subject in conjunction with the patent research and development centers.


Cooperation

 

 

Institute of physics of semiconductors of the Siberian Branch of the Russian Academy of Science, Novosibirsk, Russia

 

 

 

Aalto University School of Electrical Engineering, Finland

 

 

University of Navarra, Spain

 

 

 

Shizuoka University, Japan

 

 

 

 

Physics Institute of Stepanov NAS of Belarus, Minsk

 

Metamaterial laboratory of federal public budgetary educational institution of higher education "The St. Petersburg national research university of information technologies, mechanics and optics", St. Petersburg, Russia.

 

 

Achieved results of our laboratory:

 

1. We proposed the analytical approach to calculate all components of electric, magnetic, electromagnetic and magnetoelectric polarizabilities of electrically small inclusions with the arbitrary shape. This approach allows us to study electromagnetic properties and to determine needed structural parameters of these inclusions for the realization of new structures (based on these inclusions) with desired functionalities. 

2. We derived the universal ratio between electric and magnetic dipole moments that induced in the inclusions to achieve a so-called electromagnetic balance in the structure consisting these inclusions, for example, helical, omega-type or split-ring resonators with an arbitrary distribution of current. (links to works)

3. Using numerical simulation and experimental examination, we designed metasurfaces based on helical and omega resonators allowing to convert from linear polarized incident waves to circular polarized reflected waves in the microwave range. 

4. In accordance with the classical theory of dipolar radiation, we proposed the model which describes the mechanism of electromagnetic waves radiation by any site of a double right-handed (RH) DNA-like helix. It was shown that DNA-like helix emits left-handed (LH) circular polarization electromagnetic waves in the case of the main resonant mode. Such polarization of the emitted waves remains invariable at an arbitrary distribution of electric current in the DNA-like helix, that is at any sequence of the nitrogenous bases in the helix. We suppose that such effect of polarizing selectivity plays a very important role in the genetic preservation of distinctions between the RH and LH selective objects of wildlife. 

5. Based on theoretical calculations of structural parameters of a DNA-like helix, we have experimentally studied the polarization selectivity of LH and RH waves with a periodic lattice consisting of DNA-like helical resonators in the microwave range. Theoretical and experimental results demonstrate total polarization selectivity of electromagnetic radiation at the resonance. It should be noted that the calculated angle pitch of the helix is the same as in the real DNA helix (well-known from experimental data). This suggests that the real DNA helix can have such a shape and geometric parameters are not accidentally, namely its parameters are tuned to the maximum selectivity for electromagnetic radiation. At present, we are aiming at confirming this hypothesis. 

6. Realization of functional off-resonance transparent helix-based and omega-type polarization rotator and perfect absorber metasurfaces for microwave and infrared spectral range. 

7. It was designed a measured system to study the propagation of bulk acoustic waves in solids and so on.