Local excitation of dipole resonance mode in microstrip closed ring resonator of subterahertz frequencies

 

A. Snezhko ^1,2, O. Volkov ¹, V. Gubankov ¹, I. Gundareva ^1,3, Yu. Divin ^1,3, V. Pavlovskiy ¹, V. Pokalyakin ¹

¹ Kotelnikov Institute of Radio-engineering and Electronics of RAS

² Moscow Institute of Physics and Technology

³ Peter Grünberg Institute, PGI-5, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany

 

The paper is received on December 4, 2016

 

Abstract. Here the results of subterahertz frequency closed ring resonator study are presented. Microstrip ring resonator was formed from cooper 400 mm film of 400 mm thickness on sapphire substrate by ultraviolet lithography and wet etching and covered by thin PMMA layer. It has a form of square with 111 mm external side length and 95 mm internal side length. Substrate with the resonator was attached to planar bicrystal Josephson junction from YBa₂Cu₃O_7-x high temperature superconductor on NdGaO₃ substrate. Resonator was excited by the electric field of Josephson junction in 200-650 GHz frequency range. A dependence of Josephson junction differential resistance on frequency has a peculiarity, related to resonance mode excitation. It is known that in ac Josephson effect dc voltage bias is proportional to the Josephson oscillation frequency. In our case peculiarity voltage corresponded to central resonance frequency of 321 GHz. To analyze resonance mode observed, 3D electromagnetic simulation was performed. A passive electrodynamic system was considered, which consisted of Josephson junction electrodes and a resonator. Real part of the electrodynamic system admittance vs. frequency dependence and current density distribution at the resonance frequency were calculated, It was shown that the resonance observed corresponded to excitation of an even dipole mode. Excitation of this mode was related to electrodynamic system symmetry. This result agreed with earlier experiments on electromagnetic radiation interaction with arrays of microstrip ring resonators.

Key words: superconductivity, Josephson junction, terahertz electronics.

References

1.         Troughton P. Measurement Techniques in Microstrip. // Electron. Lett. 1969, Vol. 5, No 2, pp. 25 –26. 

2.          Wolff I., Koppik N., Microstrip ring resonator and dispersion measurement on microstrip lines. // Electron. Lett., 1971, Vol. 7, No 26, pp. 779–781.

3.          Edwards C. Microstrip measurements. IEEE MTT-S [Int.Microwave Symp. Dig.], Dallas, TX, 1982., pp. 338–341.

4.          Bernard P. A., Gautray J.M. Measurement of dielectric constant using a microstrip ring resonator. // IEEE Trans. Microwave Theory Tech., 1991, Vol. 39, pp. 592–595,

5.          Stephenson, I. M., Easter B. Resonant techniques for establishing the equivalent circuits of small discontinuities in microstrip. // Electron. Lett., 1971, No 7, pp. 582–584.

6.          Hoefer, W. J. R., Chattopadhyay A. Evaluation of the equivalent circuit parameters of microstrip discontinuities through perturbation of a resonant ring. // IEEE Trans. Microwave Theory Tech. 1975, Vol. 23, pp. 1067–1071.

7.          Jovanovic, S., Nesic A. Microstrip bandpass filter with new type of capacitive coupled resonator. // Electron. Lett., 2005, Vol. 41, No 1, pp. 12–13.

8.          Prabhu S., Mandeep J.S. Microstrip bandpass filter at S-band using capacitive coupled resonator. // Prog. Electromagn. Res. PIER. 2007, Vol. 76, pp. 223–228.

9.          Parker, E. A., Hamdy S. M. A. Rings as elements for frequency selective surface. // Electron. Lett., 1981, Vol. 17, No 17, pp. 612–614,

10.      Nagel M., Richter F., Haring-Bol´ıvar P., et al. A functionalized THz sensor for marker-free DNA analysis. // Phys. Med. Biol. 2003, Vol. 48 pp. 3625–3636.

11.      Divin, Y., Snezhko, A., Poppe U., et al. Terahertz Applications of Hilbert-Transform Spectral Analysis. // IEEE Transactions on Applied Superconductivity, 2014, Vol. 24, No 4, p.1500807.

12.      Pavlovskii, V.V., Gundareva, I.I., Volkov, O.Yu., et al. Extension of the frequency range of Josephson impedance spectroscopy. // Journal of Communications Technology and Electronics, 2013, Vol. 58, No 9, pp. 951-955.

13.      Snezhko A.V,, Gubankov V.N. Coupling of bicrystal Josephson junction and planar resonator. // Nelineinyi Mir - Nonlinear World, 2015, Vol. 13,No 2, pp. 46 – 48. (In Russian)

14.      Volkov, O.Yu., Gubankov V.N., Gundareva, I.I., et al. Josephson spectroscopy for local diagnostics of planar resonator systems in the millimeter wave band. // Journal of Communications Technology and Electronics, 2015, Vol. 60 No 9, pp 1006-1010.

15.      Snezhko A., Volkov O., Gubankov V.,, et al. Frequency Characterization of Planar Resonators by terahertz Josephson spectroscopy. [Progress In Electromagnetics Research Symposium] July 6-9, 2015, Prague, Czech Republic.

16.      A.Snezhko, O.Volkov, V.Gubankov, et al. Spectral Characterization of Planar Resonators by terahertz Josephson spectroscopy». // [40th International Conference on Infrared, Millimeter and Terahertz Waves] August 23-28, 2015. Hong Kong, China.

17.      Snezhko A., Pavlovskiy V., Gubankov V., et al. Frequency‐Selective Analysis Of THz Photonic Elements By The Ac Josephson Effect. [41th International Conference on Infrared, Millimeter and Terahertz Waves] September 25-30, 2016. Copenhagen, Denmark.

18.      Snezhko A., Pavlovskiy V., Gubankov V. Equivalent circuit of planar open ring resonator interacting with Josephson junction in terahertz frequency range. // Zhurnal Radioelektriniki-Journal of Radio Electronics, 2015, No 11, URL: http://jre.cplire.ru/jre/nov15/9/text.pdf. (In Russian)

19.      Divin, Yu.Ya., Kotelyanskij, I.M., Gubankov, V.N. Bicrystal Josephson junctions for terahertz Hilbert-transform spectroscopy. // Journal of Communications Technology and Electronics, 2003, Vol. 48, No 10, Ń. 1238-1249.

20.      Enkrich C., Wegener M., Linden S., et al. Magnetic Metamaterials at Telecommunication and Visible Frequencies. // Phys. Rev. Lett. 2005, Vol.95, p. 203901.