A5017642520- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- Advanced Semiconductor Detectors and Materials
- Superconducting and THz Device Technology
- Mechanical and Optical Resonators
- 2D Materials and Applications
- Photonic Crystals and Applications
- Graphene research and applications
- Energy Harvesting in Wireless Networks
- Thermal Radiation and Cooling Technologies
- Optical Wireless Communication Technologies
- Advanced Memory and Neural Computing
- Nanowire Synthesis and Applications
Moscow Institute of Physics and Technology
2020-2025
Moscow Power Engineering Institute
2023
Abstract Electrically induced p − n junctions in graphene bilayer have shown superior performance for detection of sub‐terahertz radiation at cryogenic temperatures, especially upon electrical induction the bandgap E g . Still, upper limits responsivity and noise equivalent power (NEP) very large remained unknown. Here, detectors f = 0.13 THz is studied by inducing gaps up to ≈ 90 meV, a value close observed recent transport experiments. High gap achieved using high‐κ bottom hafnium dioxide...
Structural or crystal asymmetry are necessary conditions for emergence of zero-bias photocurrent in light detectors. has been typically achieved via $p-n$ doping being a technologically complex process. Here, we propose an alternative approach to achieve 2d material flakes exploiting the geometrical non-equivalence source and drain contacts. As prototypical example, equip square-shaped flake PdSe$_2$ with mutually orthogonal metal leads. Upon uniform illumination linearly-polarized light,...
Infrared (IR) and terahertz plasmons in two-dimensional (2D) materials are commonly excited by metallic or dielectric grating couplers with deep-submicron features fabricated e-beam lithography. Mass reproduction of such gratings at macroscopic scales is a labor-consuming expensive technology. Here, we show that localized graphene can be generated on based randomly oriented particle-like nanorods (NRs) close proximity to layer. We monitor the excitation indirectly tracking changes...
Electrically induced $p-n$ junctions in graphene bilayer (GBL) have shown superior performance for detection of sub-THz radiation at cryogenic temperatures, especially upon electrical induction the band gap $E_g$. Still, upper limits responsivity and noise equivalent power (NEP) very large $E_g$ remained unknown. Here, we study GBL detectors $f=0.13$ THz by inducing gaps up to $E_g \approx 90$ meV, a value close observed recent transport experiments. High is achieved using high-$\kappa$...
Structural or crystal asymmetry are necessary conditions for emergence of zero-bias photocurrent in light detectors. has been typically achieved via $p-n$ doping being a technologically complex process. Here, we propose an alternative approach to achieve 2d material flakes exploiting the geometrical non-equivalence source and drain contacts. As prototypical example, equip square-shaped flake PdSe$_2$ with mutually orthogonal metal leads. Upon uniform illumination linearly-polarized light,...
Dynamicallyprogrammable metasurfaces capable of manipulating terahertz (THz) wavefronts in various manners depending on external controls are highly desired for next-generation wireless communication systems and new tools THz diagnostics. Such may utilize the insulator-to-metal transition VO2, which can be induced both electrically optically. Optical control is especially convenient individual addressing to each meta-atom, but it hampered by high optical switching threshold VO2. We...
The VO2-based THz metasurface optical switching threshold is reduced by more than five orders of magnitude to 0.32-0.4 W/cm2 due the supply a subthreshold electric current. Moreover, additional deposition Au nanoparticles can further reduce 30% plasmonic effects. proposed designs and combined approach controlling sub-THz/THz transmission current light make it possible overcome existing bottleneck in design dynamically programmable mirror array based on metasurfaces.