Graphene-based Josephson parametric amplifiers for highly sensitive bolometry

ORAL

Abstract

Sensitive, broadband bolometers are of great interest because of their versatile usage in broad areas starting from radio astronomy, material science, and security development research. To date, the widely used sensitive bolometers are transition edge sensors and kinetic inductance detectors which provide a noise equivalent power (NEP) of ~ 500 zW/√Hz. Recently 2D vdW material-based bolometers have improved the NEP and response time by exploiting the material properties, however, the NEP can be further upgraded by improving the sensitivity and intrinsic noise level of the sensors. The Josephson parametric amplifiers (JPA) are the routinely used devices for low-noise amplification of quantum signals in cQED experiments, which boost the signal-to-noise ratio significantly. Our recent work demonstrates the implementation of a gate-tunable JPA using a graphene Josephson junction, where we change the device bias using electrostatic gating [1]. Electrostatic control is advantageous over magnetic flux control in cQED devices as it uses a very localized electric field which causes less interference. In addition and in contrast with the Al-based tunnel junctions, the attractive material properties of graphene: low heat capacity, and low electron-phonon coupling, imply a single-photon detector integrated with the quantum noise limited amplifier is realizable using our device. In this talk, we will discuss the bolometric response of our graphene JPA device.

*Funding support: DAE, DST of India.

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Publication: *Funding support: DAE, DST of India.

[1] J. Sarkar et al., Quantum noise limited microwave amplification using a graphene Josephson junction, Nature Nanotechnology, 17, 1147-1152 (2022).

Presenters

  • Joydip Sarkar

    • Tata Institute of Fundamental Research, Mumbai

Authors

  • Joydip Sarkar

    • Tata Institute of Fundamental Research, Mumbai

  • Krishnendu Maji

    • Tata Institute of Fundamental Research, Mumbai

  • Abhishek Sunamudi

    • Indian Institute of Science Education and Research Kolkata

  • Heena Agarwal

    • Tata Institute of Fundamental Research
    • Tata Institute of Fundamental Research Mumbai

  • Meghan P Patankar

    • Tata Institute of Fundamental Research Mumbai

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science

  • Takashi Taniguchi

    • Kyoto Univ
    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Sciences
    • NIMS
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, NIMS, Japan
    • International Center for Materials Nanoarchitectonics, Tsukuba
    • National Institue for Materials Science
    • Kyoto University
    • National Institute of Materials Science
    • International Center for Materials Nanoarchitectonics and National Institute for Materials Science

  • Mandar M Deshmukh

    • Tata Institute of Fundamental Research (TIFR)