Coherent emission from large arrays of discrete Josephson junctions

Song, F.; Müller, F.; Behr, R.; Klushin, A. M.
October 2009
Applied Physics Letters;10/26/2009, Vol. 95 Issue 17, p172501
Academic Journal
We observed coherent emission at the frequency of 76 GHz from a large-area array of 7500 niobium junctions embedded in the quasioptical resonator at liquid helium temperature. The maximal detected power of 2 μW was measured by a room temperature superheterodyne receiver. To explain the coherent behavior of the array of Josephson junctions, electromagnetic field simulations were performed. Considering the substrate as a dielectric resonator antenna, the coherent emission was excited if the locations of each subarray coincided with the positions of the maximum electric field intensity in the substrate resonance mode.


Related Articles

  • Resistive measurement of the temperature dependence of the penetration depth of Nb in Nb/AlOx/Nb Josephson junctions. Kim, D. H.; Gray, K. E.; Hettinger, J. D.; Kang, J. H.; Choi, S. S. // Journal of Applied Physics;6/15/1994, Vol. 75 Issue 12, p8163 

    Presents a study that determined the temperature dependence of the penetration depth of niobium (Nb) films in Nb/aluminum oxide/Nb Josephson junctions. Theoretical background; Analysis of the resistive transitions in the Josephson junctions; Estimation of the Josephson penetration depth;...

  • Compact tunable sub-terahertz oscillators based on Josephson junctions. Fengbin Song; M�xFC;ller, Franz; Scheller, Thomas; Semenov, Alexei; Ming He; Lan Fang; Hübers, Heinz-Wilhelm; Klushin, Alexander M. // Applied Physics Letters;4/4/2011, Vol. 98 Issue 14, p142506 

    Essential applications of terahertz technology are urgently in need of compact, tunable solid-state continuous wave radiation sources. However, no satisfactory solution is yet available for the frequency range of up to approximately 1.0 THz. Here, we present coherent radiation from large series...

  • Microwave intermodulation products and excess critical current in YBa[sub 2]Cu[sub 3]O[sub 7-x].... Sollner, T.C.L. Gerhard; Sage, Jay P. // Applied Physics Letters;2/12/1996, Vol. 68 Issue 7, p1003 

    Investigates microwave intermodulation products and excess critical current in Josephson junctions. Measurement of third-order intermodulation power in the microwave resonator; Use of coupled-grain model to describe the microwave properties of high-temperature superconductors; Relationship...

  • Numerical calculation of the height of velocity-matching step of flux-flow type Josephson oscillator. Zhang, Y. M.; Wu, P. H. // Journal of Applied Physics;11/1/1990, Vol. 68 Issue 9, p4703 

    Examines the height of the velocity-matching step of a flux-flow type Josephson oscillator by numerical simulations. Use of a perturbed sine-Gordon equation; Overview of the distribution of electromagnetic fields; Dependence of step height on the eternal magnetic field.

  • Detection of 0.5 THz radiation from intrinsic Bi2Sr2CaCu2O8 Josephson junctions. Batov, I. E.; Jin, X. Y.; Shitov, S. V.; Koval, Y.; Müller, P.; Ustinov, A. V. // Applied Physics Letters;6/26/2006, Vol. 88 Issue 26, p262504 

    We report the detection of electromagnetic radiation at about 500 GHz from current-biased intrinsic Bi2Sr2CaCu2O8 single crystal Josephson junctions. We used two silicon lenses to quasioptically couple radiation from our samples to an integrated superconducting heterodyne receiver. The estimated...

  • Josephson effect in coherent roton aggregates. Melnikovsky, L. // JETP Letters;Dec2013, Vol. 98 Issue 7, p378 

    A localized microwave electromagnetic field in liquid helium behaves as a laser of rotons: it produces a coherent roton aggregate. We show that the whispering gallery mode of the dielectric resonator excites multiple coherent aggregates simultaneously and predict a Josephson effect between them....

  • Mutual phase locking on resonant flux-flow steps in stacked long Josephson junctions. Carapella, G.; Costabile, G. // Applied Physics Letters;12/8/1997, Vol. 71 Issue 23, p3412 

    Examines mutual locking in the resonant flux-flow mode obtained by independent biasing of two Josephson junctions at four differing states. Resonant flux flow steps in biased and unbiased junctions; Modification of junction A dynamics by the changing the current in junction B; Stability of...

  • Possible phase locking of vertically stacked Josephson flux-flow oscillators. Ustinov, A.V.; Kohlstedt, H. // Applied Physics Letters;9/12/1994, Vol. 65 Issue 11, p1457 

    Examines a system of two vertically stacked niobium/Al-AlO[sub x]/Nb long Josephson junctions. Observation of magnetic coupling between junctions; Examination of current-voltage characteristics of the stack displaying resonant steps; Application of stacked long Josephson junctions as local...

  • Fluxon propagation on a parallel array of microbridge-type Josephson junctions. Hontsu, Shigeki; Ishii, Junya // Journal of Applied Physics;3/15/1988, Vol. 63 Issue 6, p2021 

    Presents a study which described the experimental results and theoretical considerations of the dynamic behavior and propagation of fluxons on a parallel array of the nionbium microbridge-type Josephson junctions. Fabrication method of parallel array; Direct-current (dc) voltage characteristics...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics