Resonant subterahertz coherent acoustic waves excitation by Josephson junction

Polzikova, N. I.; Mansfeld, G.D.; Tokpanov, Yury S.; Koshelets, V. P.

doi:10.1109/fcs.2011.5977826

Cited by 3 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This explanation of the SFRS was confirmed by a preliminary theoretical consideration [36] where coherent phonon radiation and detection due to the interaction of Josephson's electromagnetic oscillations with a mechanical displacement field have been analyzed. The Josephson tunneling structure together with the silicon substrate constitutes a high overtone composite resonator for bulk acoustic waves propagating normally to the layers.…”

Section: Resultsmentioning

confidence: 58%

“…On the other hand, the roughness of the etched Si substrate is negligibly small at sub-THz frequencies and allows good RF coupling of the integrated receiver that is installed on the flat surface of the synthesized elliptical Si lens [35]. This explanation of the SFRS was confirmed by preliminary theoretical consideration [36] where coherent phonon radiation and detection due to the interaction of Josephson's electromagnetic oscillations with mechanical displacement field have been analyzed. The Josephson tunneling structure together with silicon substrate constitutes a high overtone composite resonator for bulk acoustic waves propagating normally to the layers.…”

Section: Resultsmentioning

confidence: 75%

See 1 more Smart Citation

Sub-terahertz sound excitation and detection by a long Josephson junction

Koshelets¹

2014

Supercond. Sci. Technol.

View full text Add to dashboard Cite

The paper reports on experimental observation of sub-terahertz sound wave generation and detection by a long Josephson junction. This effect was discovered at spectral measurements of sub-terahertz electromagnetic emission from a flux-flow oscillator (FFO) deposited on optically polished Si substrate. The "back action" of the acoustic waves generated by the FFO and reflected by the bottom surface of the Si substrate results in the appearance of resonant steps in the FFO IVCs with spacing as small as 29 nV for 0.3 mm substrate thickness; these steps manifest themselves in a pronounced resonant structure in the emission spectra with spacing of about 14 MHz precisely according to the Josephson relation. The mechanism of acoustic wave generation and detection by the FFO is discussed; a possibility for employing the discovered effect for FFO frequency stabilization has been demonstrated. A simple and reliable way to suppress the superfine resonant structure has been developed and proven; this invention allows for continuous frequency tuning and FFO phase locking at any desired frequency, all of which is vitally important for most applications.

show abstract

Section: Resultsmentioning

confidence: 58%

Section: Resultsmentioning

confidence: 75%

Sub-terahertz sound excitation and detection by a long Josephson junction

Koshelets¹

2014

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Apart from the example of the conventional FFO studied here, an admittedly incomplete list of the affected systems and phenomena includes detection and excitation of subterahertz sound by long Josephson junctions [119,120], Cherenkov [121,122] and exponentially shaped [92,[99][100][101] FFOs, transmission line intersections and networks [123][124][125][126][127][128], Josephson frequency comb generators [129,130], annular Josephson junction [131,132] and its variations [133][134][135], linear [136] and nonlinear [137,138] fluxon modes in 2D junctions, Josephson vortex qubits [139][140][141][142], pumps [143] and ratchets [144][145][146][147][148][149][150].…”

Section: Discussionmentioning

confidence: 99%

Josephson flux-flow oscillator: The microscopic tunneling approach

2017

View full text Add to dashboard Cite

Citation: GULEVICH, D.R., KOSHELETS, V.P. and KUSMARTSEV, F.V., 2017.Josephson flux-flow oscillator:The microscopic tunneling approach.Physical Review B, 96 (2), 024515-1 -024515-12.Additional Information:• We elaborate a theoretical description of large Josephson junctions which is based on Werthamer's microscopic tunneling theory. The model naturally incorporates coupling of electromagnetic radiation to the tunnel currents and, therefore, is particularly suitable for description of the self-coupling effect in Josephson junction. In our numerical calculations we treat the arising integro-differential equation, which describes temporal evolution of the superconducting phase difference coupled to the electromagnetic field, by the Odintsov-Semenov-Zorin algorithm. This allows us to avoid evaluation of the time integrals at each time step while taking into account all the memory effects. To validate the obtained microscopic model of large Josephson junction we focus our attention on the Josephson flux-flow oscillator. The proposed microscopic model of flux-flow oscillator does not involve the phenomenological damping parameter, rather the damping is taken into account naturally in the tunnel current amplitudes calculated at a given temperature. The theoretically calculated current-voltage characteristics is compared to our experimental results obtained for a set of fabricated flux-flow oscillators of different lengths.

show abstract