Harmonic mixing using a HTS step-edge Josephson junction at 0.6 THz frequency

Jia Du; Colin Pegrum; Xiang Gao; Andrew R. Weily; Ting Zhang; Yingjie Jay Guo; Cathy P. Foley

doi:10.1109/TASC.2016.2636081

Harmonic mixing using a HTS step-edge Josephson junction at 0.6 THz frequency

Jia Du, Colin Pegrum, Xiang Gao, Andrew R. Weily, Ting Zhang, Yingjie Jay Guo, Cathy P. Foley

Physics

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Abstract

A high-temperature superconducting (HTS) terahertz (THz) heterodyne mixer based on a thin-film antenna - coupled YBa2Cu3O7-x (YBCO) step-edge Josephson junction is presented. The frequency down-conversion from 0.6 THz to an intermediate frequency (IF) of 2 GHz was achieved using high-order harmonic mixing of a local oscillator (LO), thus removing the need to use a second THz source as the LO pumping source. The DC and RF characteristics of the harmonic mixer as well as the relationship of the IF output power versus the harmonic number were experimentally studied and compared with simulated results. Most of our measurements were made at 40K, but we also observed stable harmonic mixing at 77K which we believe has not been reported previously in HTS junction mixers.

Original language	English
Number of pages	5
Journal	IEEE Transactions on Applied Superconductivity
Volume	27
Issue number	4
Early online date	6 Dec 2016
DOIs	https://doi.org/10.1109/TASC.2016.2636081
Publication status	Published - 30 Jun 2017

Keywords

simulation
high-temperature superconductor
Josephson mixer
terahertz mixer
harmonic mixing

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Du-etal-IEEETAS2016-Harmonic-mixing-using-a-HTS-step-edge-Josephson-junctionAccepted author manuscript, 642 KB

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title = "Harmonic mixing using a HTS step-edge Josephson junction at 0.6 THz frequency",

abstract = "A high-temperature superconducting (HTS) terahertz (THz) heterodyne mixer based on a thin-film antenna - coupled YBa2Cu3O7-x (YBCO) step-edge Josephson junction is presented. The frequency down-conversion from 0.6 THz to an intermediate frequency (IF) of 2 GHz was achieved using high-order harmonic mixing of a local oscillator (LO), thus removing the need to use a second THz source as the LO pumping source. The DC and RF characteristics of the harmonic mixer as well as the relationship of the IF output power versus the harmonic number were experimentally studied and compared with simulated results. Most of our measurements were made at 40K, but we also observed stable harmonic mixing at 77K which we believe has not been reported previously in HTS junction mixers.",

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author = "Jia Du and Colin Pegrum and Xiang Gao and Weily, {Andrew R.} and Ting Zhang and Guo, {Yingjie Jay} and Foley, {Cathy P.}",

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AU - Du, Jia

AU - Pegrum, Colin

AU - Gao, Xiang

AU - Weily, Andrew R.

AU - Zhang, Ting

AU - Guo, Yingjie Jay

AU - Foley, Cathy P.

N1 - © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2017/6/30

Y1 - 2017/6/30

N2 - A high-temperature superconducting (HTS) terahertz (THz) heterodyne mixer based on a thin-film antenna - coupled YBa2Cu3O7-x (YBCO) step-edge Josephson junction is presented. The frequency down-conversion from 0.6 THz to an intermediate frequency (IF) of 2 GHz was achieved using high-order harmonic mixing of a local oscillator (LO), thus removing the need to use a second THz source as the LO pumping source. The DC and RF characteristics of the harmonic mixer as well as the relationship of the IF output power versus the harmonic number were experimentally studied and compared with simulated results. Most of our measurements were made at 40K, but we also observed stable harmonic mixing at 77K which we believe has not been reported previously in HTS junction mixers.

AB - A high-temperature superconducting (HTS) terahertz (THz) heterodyne mixer based on a thin-film antenna - coupled YBa2Cu3O7-x (YBCO) step-edge Josephson junction is presented. The frequency down-conversion from 0.6 THz to an intermediate frequency (IF) of 2 GHz was achieved using high-order harmonic mixing of a local oscillator (LO), thus removing the need to use a second THz source as the LO pumping source. The DC and RF characteristics of the harmonic mixer as well as the relationship of the IF output power versus the harmonic number were experimentally studied and compared with simulated results. Most of our measurements were made at 40K, but we also observed stable harmonic mixing at 77K which we believe has not been reported previously in HTS junction mixers.

KW - simulation

KW - high-temperature superconductor

KW - Josephson mixer

KW - terahertz mixer

KW - harmonic mixing

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DO - 10.1109/TASC.2016.2636081

M3 - Article

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VL - 27

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 4

ER -

Harmonic mixing using a HTS step-edge Josephson junction at 0.6 THz frequency

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Keywords

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