DEVELOPMENT OF METHODS FOR MASKING CRITICALLY IMPORTANT AND LITAL OBJECTS IN A WIDE RADIO FREQUENCY RANGE
We propose:
- Study of surface plasmon-polariton waves and corresponding plasmon resonances, focusing on the maxima of absorption observed near them.
- Study of excitation of the grating-mode resonances, where maxima of the amplitude of the excited waveguide natural waves are observed. These waves carry power of the incident wave along the waveguide axis, not towards the radiator.
- Due to the geometrical properties, it is possible to achieve re-reflection of the power of the incident field away from the radiator. Cylindrical inclusions are studied for structural simplification for ease of mechanical rotation.
- Study of multilayer structures consisting of profiled elements of state-of-the-art materials, nanofilms, and semiconductor layers.
- Adjusting the equivalent impedance of the structure to match that of free space to minimize reflection.
- Development of a profiled multilayer absorption coat, transparent in the optical range.
Mstyslav E. Kaliberda, KaliberdaME@gmail.com
ScopusID: 55847906200
Sergey A. Pogarsky, SPogarsky@gmail.com
ScopusID: 6603566968
NOVEL MICRO/NANO LASERS
We study the threshold conditions of a novel plasmonic micro/nanolaser. Namely, we consider a laser configuration, which is a composite open resonator, containing circular quantum wire and graphene/metal strips.
We demonstrate the fundamental significant tunability of the emission frequency, with the potential to double or even triple the frequency through the application of an electrostatic field. In addition to operating in different frequency ranges, the threshold values of the gain index are orders of magnitude lower in the considered configurations. This reduction in threshold values contributes to lower energy consumption. This allows to design quasi single-mode electrically tunable lasers with plasmon modes as operating ones.
Mstyslav E. Kaliberda, KaliberdaME@gmail.com
ScopusID: 55847906200
Sergey A. Pogarsky, SPogarsky@gmail.com
ScopusID: 6603566968
TUNABLE LEAKY-WAVE ANTENNAS
We explore the physical principles underlying the construction of antennas based on a plasmonic waveguide with multilayer inclusions. We uncover methods for controlling radiation characteristics, demonstrating the tunability of the angle of the radiation pattern by applying an electrostatic field to the nanofilm. Additionally, we showcase the ability to control the radiated power by applying the electrostatic field to the strips.
The tunability of radiation patterns when electrostatic field is applied:
Mstyslav E. Kaliberda, KaliberdaME@gmail.com
ScopusID: 55847906200
Sergey A. Pogarsky, SPogarsky@gmail.com
ScopusID: 6603566968
ELEMENT FOR REDUCING/INCREASING THE RADAR CROSS SECTION
We study the properties of the controlled reduction and increase of the radar cross-section in the THz and IR range, depending on the applied electrostatic field. We ptopose a structure based on a dielectric cylinder with micro- and nano-strips, leveraging the effects of exciting plasmon resonances along with the modes of the whispering gallery.
MICRO/NANO ANTENNA BASED ON THE DIELECTRIC ROD WITH THE SYSTEM OF STRIPS
The presented structure can also be considered as tunable antenna element. The following physical principles are used: focusing of the incident field by the lens in the form of the dielectric rod, resonance properties of the opened strip-resonators.
Near fields. Excitation of the plasmon resonances on the strip and focusing of the incident field.
Radar cross section vs the frequency and the angle of inclination of the strips for various chemical potential
Mstyslav E. Kaliberda, KaliberdaME@gmail.com
ScopusID: 55847906200
Sergey A. Pogarsky, SPogarsky@gmail.com
ScopusID: 6603566968