Abstract:
A source of terahertz (THz) frequency range based on a long Josephson junction is proposed and studied experimentally. The emission is transmitted to open space using a slot antenna located on a single chip with the oscillator and matched to collecting lens. We fabricated and studied several designs of the emitter developed for frequency ranges of 250 – 410 GHz, 330 – 530 GHz and 390 – 700 GHz with continuous frequency tuning. The spectral characteristics of output emission are studied using a THz spectrometer based on the superconducting receiver with spectral resolution of about 0.1 MHz. The antenna characteristics in full range of operation are studied using a cooled silicon bolometer with high sensitivity. Experimental results match to numerical simulations.
This study was supported by the Russian Scientific Foundation (grant no. 17-79-20343). The samples were fabricated on the unique scientific unit (USU no. 352529) (Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences), which was created and functions at the expense of budget funding within the framework of a state task.
Citation:
N. V. Kinev, K. I. Rudakov, L. V. Filippenko, V. P. Koshelets, A. M. Baryshev, “Terahertz source emitting to open space based on long Josephson junction”, Fizika Tverdogo Tela, 62:9 (2020), 1379–1384; Phys. Solid State, 62:9 (2020), 1543–1548