N.V. Kinev − Ph.D. (Phys.-Math.), Senior Research Scientist,

Kotel’nikov Institute of Radio Engineering and Electronics of RAS

E-mail: nickolay@hitech.cplire.ru

K.I. Rudakov − Engineer,

Kotel’nikov Institute of Radio Engineering and Electronics of RAS

E-mail: kirill.i.rudakov@gmail.com

L.V. Filippenko − Ph.D. (Phys.-Math.), Senior Research Scientist,

Kotel’nikov Institute of Radio Engineering and Electronics of RAS

E-mail: lyudmila@hitech.cplire.ru

V.P. Koshelets − Dr.Sc. (Phys.-Math.), Principal Research Scientist, Professor, 

Kotel’nikov Institute of Radio Engineering and Electronics of RAS

E-mail: valery@hitech.cplire.ru

Problem formulating. Nowadays there is a lack of widely tunable sources of terahertz (THz) frequency range. All available at present time THz oscillators have either narrow tuning band or large weight and dimensions, or not available to purchase. Goal. To develop a widely tunable oscillator emitting to open space based on the superconducting Josephson junction coupled to a transmitting antenna.

Result. The principal layout has been proposed, and the integrated designs of the tunable THz-oscillator operating in the ranges of 250…410 GHz, 330…530 GHz and 390…700 GHz, which covers the region of 0.25…0.7 THz, have been developed and studied experimentally. The spectral linewidth in phase locking mode is about 0.1 MHz.

Practical meaning. The oscillator developed can be used as an active source for THz-spectroscopy, THz-microscopy, for studying the properties of materials at low temperatures (about 4.2 K), and as a local heterodyne for receivers.

1. de Lange G., Boersma D., Dercksen J., et al. Development and characterization of the superconducting integrated receiver channel of the TELIS atmospheric sounder. Supercond. Sci. Technol. 2010. V. 23. № 4. Р. 045016. DOI:10.1088/09532048/23/4/045016.
2. Koshelets V.P., Dmitriev P.N., Faley M.I., et al. Superconducting Integrated Terahertz Spectrometers. IEEE Trans. Terahertz Sci. Technol. 2015. V. 5. № 4. P. 687–694. DOI: 10.1109/TTHZ.2015.2443500.
3. Kinev N.V., Rudakov K.I., Baryshev A.M., Koshelec V.P. Linzovaya shchelevaya antenna na osnove tonkih plenok Nb dlya dzhozefsonovskogo shirokopolosnogo generatora TGc-diapazona. Fizika tverdogo tela. 2018. T. 60. № 11. S. 2132−2136. DOI:10.21883/FTT.2018.11.46652.03NN (in Russian).
4. Kinev N.V., Rudakov K.I., Baryshev A.M., Koshelets V.P. A 0.3-0.7 THz flux-flow oscillator integrated with the slot antenna and elliptical lens. J. Phys.: Conf. Series. 2018. V. 1124. P. 071001. DOI:10.1088/1742-6596/1124/7/071001.
5. Kinev N.V., Rudakov K.I., Filippenko L.V., Baryshev A.M., Koshelets V.P. Wideband Josephson THz flux-flow oscillator integrated with the slot lens antenna and the harmonic mixer. EPJ Web Conf. 2018. V. 195. P. 02003. DOI: 10.1051/epjconf/201819502003.
6. Kinev N.V., Rudakov K.I., Filippenko L.V., Baryshev A.M., Koshelets V.P. A 0.33-0.73 THz source based on phase-locked Josephson flux-flow oscillator. Proc. of 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC). 2019. V. 1. P. 1−4.  DOI:10.23919/URSIAP-RASC.2019.8738374.
7. Kinev N.V., Rudakov K.I., Filippenko L.V., Koshelets V.P. A Tunable subTHz Source Based on the Josephson Oscillator with Phase Locking. Proc. of 2019 Radiation and Scattering of Electromagnetic Waves (RSEMW). 2019. V. 1. P. 192−195. DOI:10.1109/RSEMW.2019.8792799.
8. Kinev N.V., Rudakov K.I., Filippenko L.V., Baryshev A.M., Koshelets V.P. Flux-flow Josephson oscillator as the broadband tunable terahertz source to open space. J. Appl. Phys. 2019. V. 125, № 15. P. 151603. DOI:10.1063/1.5070143.
9. Kinev N.V., Rudakov K.I., Filippenko L.V., Baryshev A.M., Koshelets V.P. Terahertz Source Radiating to Open Space Based on the Superconducting Flux-Flow Oscillator: Development and Characterization. IEEE Trans. Terahertz Sci. Technol. DOI:10.1109/TTHZ.2019.2941401.