Institute of High Pressure Physics

Project title: Device focused research of amplification, generation and control of terahertz radiation

Polish Academy of Sciences – PAN BFB.S.BWZ.367.022.2023 LTP for Ukraine;​

Principal Investigator: Prof. V. Kochelap;​

Team members: Prof. O. Bieliaiev, Prof. V. Korotieiev, Dr. S. Kukhtaruk, and Dr. Yu. Liashchuk;

Realization: 1 September 2023 – 31 August 2026.

The overall goal of the project is to explore new two-dimensional materials, their heterojunctions, hybrid nanosized systems, and new effects toward plasma-wave electronics and devices for amplification, generation and control of THz radiation.

Publications (2025)

1. N. Sokolov and V. A. Kochelap, “Current-driven plasmons in two-layer semiconductor heterostructures: Long-wavelength features and two-stream instability”, Phys. Rev. B 112, 165306 (2025). doi: https://doi.org/10.1103/7vjy-36zl
2. V. A. Kochelap and M. Yelisieiev, “Charge-fluid heating in quasi-ballistic plasmonic FETs”, Appl. Phys. Lett. 127, 182105 (2025). doi: 10.1063/5.0293820
3. P. Sai, V. V. Korotyeyev, D. B. But, M. Dub, D. Yavorskiy, J. Łusakowski, M. Słowikowski, S. Kukhtaruk,    Y. Liashchuk, J. W. Han, C. Böttger, A. Pashkin, S. Winnerl, W. Knap, M. Mittendorff, ”Extreme Terahertz Nonlinearity of AlGaN/GaN-Based Grating-Gate Plasmonic Crystals”, Adv. Optical Mater. 2025, 2500716 (2025).doi: https://doi.org/10.1002/adom.202500716
4. P. Sai, M. Dub, Y. Ivonyak, M. Slowikowski, A. Krajewska, V. Korotyeyev, W. Knap, ”Comparative study of graphene and metal-based grating-gate terahertz plasmonic structures”, J. Appl. Phys. 137, 213103 (2025) doi: https://doi.org/10.1063/5.0273253
   
   

Conferences: oral presentations (2025)

1. P. Sai, V. Korotyeyev, J. Woo Han, D. B. But, M. Dub, S. Kukhtaruk, S. Winnerl, W. Knap, M. Mittendorff, "Strong Terahertz Nonlinearity in GaN-Based Two-Dimensional Plasmonic Structures", 2025 International Conference on Mobile and Miniaturized Terahertz Systems (ICMMTS), Dubai, United Arab Emirates, 2025, pp. 1-3, doi: 10.1109/ICMMTS62835.2025.10925975.
2. P. Sai, V. Korotyeyev, G. Cywiński, M. Dub, S. Rumyantsev, W. Knap "Graphene and GaN-based 2D Plasmonic Nanostructures for THz Filters, Detectors, and Amplifiers", 2025 International Conference on Mobile and Miniaturized Terahertz Systems (ICMMTS), Dubai, United Arab Emirates, 2025, pp. 1-2,                                                           doi: 10.1109/ICMMTS62835.2025.10926012.
3. S. M. Kukhtaruk and V. A. Kochelap“, Amplification of coherent acoustic pulses in the media with excited optical phonons”, Abstracts of X Ukrainian Scientific Conference On Physics Of Semiconductors (USCPS-10), pp. 19-20, Uzhhorod, Ukraine May 26-30, (2025).
4. V. N. Sokolov and V. A. Kochelap “Peculiarities of long-wavelength plasmons and two-stream instability in double-layer quantum heterostructures”, Abstracts of X Ukrainian Scientific Conference On Physics Of Semiconductors (USCPS-10), pp. 23-24, Uzhhorod, Ukraine May 26-30, (2025).
5. G. I. Syngayivska, V. V. Korotyeyev, and V. A. Kochelap “Monte Carlo simulation of high-field and high-frequency transport characteristics of 2D electron gas in GaN-based quantum wells”, Abstracts of X Ukrainian Scientific Conference On Physics Of Semiconductors (USCPS-10), pp. 156-157, Uzhhorod, Ukraine May 26-30, (2025).

Publications (2024)

1. S. M. Kukhtaruk and V. A. Kochelap, “Multivalued dispersion equation for coupling between plasmons and surface optical phonons in a graphene/polar-substrate system”, Phys. Rev. B 110, L241403 (2024).  doi: 10.1103/PhysRevB.110.L241403
2. M. Yelisieiev, V. A. Kochelap, “Electron transport in quasi-ballistic FETs subjected to a magnetic field”, AIP Advances 14 (11), 115217 (2024). doi: https://doi.org/10.1063/5.0243812
3. M. Yelisieiev, V. A. Kochelap, ”Valley-dependent quasi-ballistic electron transport in FETs based on multi-valleys semiconductors”, AIP Advances 14 (7), 075228 (2024). https://doi.org/10.1063/5.0224808
4. M. Yelisieiev, V. A. Kochelap, “Theory of quasi-ballistic FET: steady-state regime and low-frequency noise”, Semiconductor Science and Technology, 39 (12), 125008 (2024). https://doi.org/10.1088/1361-6641/ad8bed

Conferences: oral presentations (2024)

1. P. Sai; M. Dub; S. Kukhtaruk; V. Korotyeyev; W. Knap, AlGaN/GaN Grating-Gate Plasmonic Crystals towards Tunable Terahertz Filters and Modulators, 2024 54th European Microwave Conference (EuMC), Paris, France, 2024, pp. 385-388. doi: 10.23919/EuMC61614.2024.10732169
2. S. M. Kukhtaruk and V. A. Kochelap, “Initial value problem in the case of multivalued dispersion equations”, Proceedings of Bogolyubov Kyiv Conference ” Problems of Theoretical and Mathematical Physics”, p. 71, 24-26 Sep. (2024).

Publications (2023)

1. P. Sai, M. Dub, V. Korotyeyev, S. Kukhtaruk, G. Cywinski, W. Knap, “THz properties of grating-gate plasmonic crystals”, Lithuanian Journal of Physics 63 (4), 251 (2023). doi:10.3952/physics.2023.63.4.7
2. P. Sai, V. V. Korotyeyev, M. Dub, M. Slowikowski, M. Filipiak, D. B. But, Yu. Ivonyak, M. Sakowicz, Yu. M. Lyaschuk, S. M. Kukhtaruk, G. Cywiñski, and W. Knap, “Electrical Tuning of Terahertz Plasmonic Crystal Phases”, Phys. Rev. X 13, 041003  (2023).  https://doi.org/10.1103/PhysRevX.13.041003

Conferences: oral presentations (2023)

1. P. Sai, M. Dub, V. V. Korotyeyev, W. Knap. “Terahertz Grating-Gate Plasmonic Crystals”, 24th International Conference on Applied Electromagnetics and Communications (ICECOM), Dubrovnik, Croatia, 2023, pp. 1-4.doi: 10.1109/ICECOM58258.2023.10367958
   
   
   
2. P. Sai, M. Dub, V. V. Korotyeyev, M. Filipiak, M. Slowikowski, Yu. Ivonyak et al., “Different Terahertz Phases of AlGaN/GaN Grating-Gate Plasmonic Crystals”, 48-th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Montreal, QC, Canada, (2023), pp. 1-2. doi: 10.1109/IRMMW-THz57677.2023.10299325