Ostryzhnyi Y. Electrodynamic properties of chiral objects with artificial optical activity in the microwave range

Українська версія

Thesis for the degree of Doctor of Philosophy (PhD)

State registration number

0824U003123

Thesis Registration Form

0824U003123.pdf

Applicant for

Yevhenii M. Ostryzhnyi

Specialization

104 - Фізика та астрономія

Date of defense

15-10-2024

Specialized Academic Board

ДФ ID 6921

O. Ya. Usikov Institute for Radiophysics and Electronics NAS of Ukraine

Essay

The purpose of the work is to determine the influence of the topology of dihedral waveguide inhomogeneities on the number and bandwidth of resonances of artificial optical activity. The object of research is the phenomena of electromagnetic wave scattering and artificial optical activity in waveguide nodes with dihedral symmetry. Theoretical and practical results. A more in-depth understanding of the effects that occur in layered chiral metamaterials can lead to the creation of ultra-compact polarization plane rotators with the ability to control both the operating frequency band of the device and polarization plane rotation of the transmitted wave. A model of such a polarizer was designed and experimentally verified in the X-band in a circular waveguide. The overall longitudinal size is λ/30, allowing the adjustment of the polarization plane rotation angle within ±33° by mechanically rotating one of the device's irises by an angle in the range of ±9°. The feasibility of creating similar rotators with electronic control has been demonstrated. Novelty of scientific results. For the first time, it has been shown that, despite the absence of longitudinal symmetry, dihedral-symmetry inhomogeneities in a circular waveguide exhibit the properties of a symmetric two-port network. Specifically, they have a 90-degree phase shift between the transmission and reflection coefficients and are characterized by full transmission resonances. It was also shown that the widest band of artificial optical activity is achieved in the region where two eigenmodes converge. In the case of a pair of coupled irises with a single ring of rectangular slots, this allows for a bandwidth of 5-7%. Moreover, it was demonstrated that the resonance frequencies and the quality factor of resonances in a pair of coupled irises with a single ring of rectangular slots significantly depend on the number of slots. The possibility of obtaining a multi-resonance effect of artificial optical activity by arranging the slots in several rings of coupled irises was shown for the first time. A series of ultra-compact polarization plane rotators for circular waveguides, which can be adjusted to the required rotation angle, were developed. The best design has an overall longitudinal size of λ/30 and allows for the adjustment of the polarization plane rotation angle by approximately 60°. A novel design of a polarization plane rotator formed by a pair of corrugated flanges was proposed. This device allows for the conversion of an incident wave into a cross-polarized wave within a bandwidth of about 5%. Research methods. A proprietary numerical-analytical modeling package, Microwave Desktop (MWD), based on the method of partial regions and generalized scattering matrix method, was used. The results of these calculations have been repeatedly confirmed experimentally and compared with commercial packages CST Microwave Studio and HFSS. Degree of implementation. The results of this work can be applied in the creation of waveguide polarizers and screens in the required frequency range. Scope of use. The microwave devices developed in this dissertation can be used as filters with simultaneous polarization plane rotation at the output, which can be adjusted over a wide range, from a few degrees to hundreds of degrees, including full cross-polarization of the wave.

Thesis supervisor

Oleksandr Y. Kohut
Sergii O. Steshenko

Official opponents

Volodymyr R. Tuz
Olexandr V. Hrybovskyi

Reviewers

Mykhailo P. Natarov
Eduard M. Khutorian

Research papers

1. A.A. Kirilenko, S.O. Steshenko, V.N. Derkach, Ye.M Ostryzhnyi, “A tunable compact polarizer in a circular waveguideicrow. Theory Techn. vol. 67, no. 2, pp. 592–596, Feb. 2019. DOI:10.1109/TMTT.2018.2881089

2. A.A. Kirilenko, S.O. Steshenko, V.N. Derkach, Yе.M. Ostryzhnyi, “Comparative analysis of tunable compact rotators”, Journal of Electromagnetic Waves and Applications, vol. 33, no. 3, pp. 304–319, Nov. 2018. DOI:10.1080/09205071.2018.1550443

3. A.A. Kirilenko, S. O. Steshenko, V.N. Derkach, Y.M. Ostrizhyi, L.P. Mospan, “Tunable polarization rotator on a pair of grooved flanges”, Journal of Electromagnetic Waves and Applications. 2020, 34(17), pp. 2304–2316 doi:10.1080/09205071.2020.1812442

4. A. Kirilenko, S. Steshenko, Y. Ostrizhyi, V.Derkach, “Eigen-oscillations of planar-chiral bilayer objects give rise to artificial optical activity”, Radio phys. radio astron., Vol. 29, no 1 (2024). DOI: https://doi.org/10.15407/rpra29.01.015

5. A. Kirilenko, S. Steshenko, Ye. Ostrizhyi, “Multiring Slot Arrangements for Multiband Optical Activity of Bilayer Objects”, 2022 IEEE 2nd Ukrainian Microwave Week, November 14th – 18th, 2022.

6. Ye. Ostryzhnyi, S. Steshenko, A. Kirilenko, “Topology of a planar-chiral iris as a factor in controlling the “optical activity” of a bilayer object”, 2020 IEEE Ukrainian Microwave Week (UkrMW’2020), Kharkiv, Ukraine, September 21 – 25, 2020: Proceedings. In 4 volumes. – Volume 3: 2020 IEEE 10th International Kharkiv Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW’2020). – 2020. – ISBN: 978-1-7281-7312-2. – [Electronic resource]. – P. 555 – 558.

7. V. Derkach, A. Kirilenko, A. Salogub, S. Prikolotin, N. Kolmakova, Y. Ostrizhyi, “Gigant Optical Activity in Artificial Plane-Chiral Structures”, 2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (Msmw), pp. 436-438, 2013.

8. V.N. Derkach, A.A.Kirilenko, A.N.Salogub, S.A .Prikolotin, N.G. Kolmakova, Y.M. Ostrizhyi, “Polarization Conversion by Bilayer Chiral Structure with Giant Optical Activity”, CriMiCo 2013 - 2013 23rd International Crimean Conference Microwave and Telecommunication Technology, Ukraine, Sevastopol, Ukraine, 9—13 September, 2013, pp. 994-995.

9. A. Kirilenko, S. Steshenko, Y. Ostrizhyi, V. Derkach, “Rotation of the polarization plane by grooved flanges in a circular waveguide”, 2020 IEEE Ukrainian Microwave Week (UkrMW’2020), Kharkiv, Ukraine, September 21 – 25, 2020: Proceedings. In 4 volumes. – Volume 3: 2020 IEEE 10th International Kharkiv Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW’2020). – 2020. – ISBN: 978-1-7281-7312-2. – [Electronic resource]. – P. 680 – 683.

10. O.M. Salogub, S.A. Prikolotin, N.G. Kolmakova, Y.M. Ostrizhyi, “Plane-chiral Metamaterial in a Waveguide and Free Space”, 12th Kharkiv Young Scientists Conference on Radiophysics, Electronics, Photonics and Biophysics (YSC-2012), 4 – 7 December 2012, Institute for Radiophysics and Electronics of NAS of Ukraine, Kharkiv, Ukraine.

11. O.M. Salogub, A.O. Perov, Y.M. Ostrizhyi, “Composite Plane-Chiral Iris as Part of Metamaterial Structure”, 13th Kharkiv Young Scientists Conference on Radiophysics, Electronics, Photonics and Biophysics (YSC-2013), 2 – 6 December 2013, Institute for Radiophysics and Electronics of NAS of Ukraine, Kharkiv, Ukraine.

8. O. Salogub, Y. Ostryzhniy, “Giant Optical Activity of Plane-Chiral Structure with Trapezoidal Slit,” 14th Kharkiv Young Scientists Conference on Radiophysics, Electronics, Photonics and Biophysics (YSC-2014), 14 – 17 October 2014, Kharkiv, Ukraine, report SSR&NM-11.

12. O. Salogub, Y. Ostryzhniy, “Giant Optical Activity of Plane-Chiral Structure with Trapezoidal Slit,” 14th Kharkiv Young Scientists Conference on Radiophysics, Electronics, Photonics and Biophysics (YSC-2014), 14 – 17 October 2014, Kharkiv, Ukraine, report SSR&NM-11.

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