Terahertz time domain interferometry of a SIS tunnel junction and a quantum point contact

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The author has applied the Terahertz Time Domain Interferometric (THz-TDI) technique to probe the ultrafast dynamic response of a Superconducting-Insulating-Superconducting (SIS) tunnel junction and a Quantum Point Contact (QPC). The THz-TDI technique involves monitoring changes in the dc current induced by interfering two picosecond electrical pulses on the junction as a function of time delay between them. Measurements of the response of the Nb/AlO{sub x}/Nb SIS tunnel junction from 75--200 GHz are in full agreement with the linear theory for photon-assisted tunneling. Likewise, measurements of the induced current in a QPC as a function of source-drain voltage, gate voltage, frequency, ... continued below

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202 p.

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Karadi, C. September 1, 1995.

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  • Karadi, C. Univ. of California, Berkeley, CA (United States). Dept. of Physics

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The author has applied the Terahertz Time Domain Interferometric (THz-TDI) technique to probe the ultrafast dynamic response of a Superconducting-Insulating-Superconducting (SIS) tunnel junction and a Quantum Point Contact (QPC). The THz-TDI technique involves monitoring changes in the dc current induced by interfering two picosecond electrical pulses on the junction as a function of time delay between them. Measurements of the response of the Nb/AlO{sub x}/Nb SIS tunnel junction from 75--200 GHz are in full agreement with the linear theory for photon-assisted tunneling. Likewise, measurements of the induced current in a QPC as a function of source-drain voltage, gate voltage, frequency, and magnetic field also show strong evidence for photon-assisted transport. These experiments together demonstrate the general applicability of the THz-TDI technique to the characterization of the dynamic response of any micron or nanometer scale device that exhibits a non-linear I-V characteristic. 133 refs., 49 figs.

Physical Description

202 p.

Notes

INIS; OSTI as DE96005810

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE96005810
  • Report No.: LBL--37935
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 195745
  • Archival Resource Key: ark:/67531/metadc668524

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 1995

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  • June 29, 2015, 9:42 p.m.

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  • April 5, 2016, 12:08 p.m.

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Karadi, C. Terahertz time domain interferometry of a SIS tunnel junction and a quantum point contact, thesis or dissertation, September 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc668524/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.