Spatially resolved detection of mutually locked Josephson junctions in arrays

Keck, M.; Doderer, T.; Huebener, R. P.; Traeuble, T.; Dolata, R.; Weimann, Thomas; Niemeyer, J.

doi:10.1063/1.119516

Cited by 3 publications

(4 citation statements)

References 19 publications

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“…The experimental basis is already established. Different advanced measurement methods such as LTSEM [50,94,106,109] allows the understanding of the dynamic processes in arrays and the corresponding microwave circuitry, and thus the possibility to optimize the designs.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, the group at the University of Tübingen investigated 2D arrays as microwave radiation sources [50,104,[106][107][108][109][110][111][112]. Most of the samples were fabricated in close collaboration with the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig.…”

Section: Two-dimensional Arraysmentioning

confidence: 99%

“…Keck et al applied the same LTSEM-based imaging procedure to the case of autonomous arrays (without influence of any external microwave) [106,109,111]. They were able to detect the mutually locked junctions in a 10 × 10 array while the array itself was coherently emitting at a frequency of 152 GHz.…”

Section: Two-dimensional Arraysmentioning

confidence: 99%

“…They were able to detect the mutually locked junctions in a 10 × 10 array while the array itself was coherently emitting at a frequency of 152 GHz. Figure 7 (after [109]) shows two LTSEM images together with the corresponding detector current-voltage curves. For a certain dc bias current I of the array all but a few junctions participated in the coherent emission; the non-participating junctions could be identified (black spots in figure 7(c)) and it was found that they had a clearly different critical current to the others.…”

Section: Two-dimensional Arraysmentioning

confidence: 99%

See 3 more Smart Citations

Millimetre and sub-mm wavelength radiation sources based on discrete Josephson junction arrays

Darula

Doderer

Beuven

1999

Supercond. Sci. Technol.

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This paper reviews the present status and future perspectives of discrete Josephson junction arrays for applications as sub-mm wavelength radiation sources. It is intended to cover the whole field, i.e. theory, fabrication and experimental results. The theoretical part reviews the fundamental aspects of Josephson junctions for oscillator applications and introduces the different possible array types. The recent results of analytical as well as numerical investigations are discussed. After the description of the fabrication of both low- as well as high- superconductor Josephson junctions and arrays, methods to investigate the array dynamics experimentally are mentioned. Finally, the recent experimental results are reviewed. This topic is divided into two parts, the first dealing with low- arrays, the second with high- arrays. The different possibilities to design arrays and to include them in practical applications are discussed and compared, with special emphasis on those experiments where radiation was generated successfully. The article is completed with a discussion of the most important experimental results.

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Section: Discussionmentioning

confidence: 99%