Bolometric response in graphene based superconducting tunnel junctions

Vora, Heli; Kumaravadivel, Piranavan; Nielsen, B.; Du, Xu

doi:10.1063/1.3703117

Cited by 70 publications

(74 citation statements)

References 22 publications

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“…There are three noise sources, the measurement circuit noise, the thermal fluctuations and the Johnson noise14. The first one is extrinsic and depends on how the voltage measurement circuit is implemented.…”

Section: Discussionmentioning

confidence: 99%

Highly sensitive hot electron bolometer based on disordered graphene

Han

Gao

Zhang

et al. 2013

Sci Rep

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A bolometer is a device that makes an electrical resistive response to the electromagnetic radiation resulted from a raise of temperature due to heating. The combination of the extremely weak electron-phonon interactions along with its small electron heat capacity makes graphene an ideal material for applications in ultra-fast and sensitive hot electron bolometer. However, a major issue is that the resistance of pristine graphene weakly depends on the electronic temperature. We propose using disordered graphene to obtain a strongly temperature dependent resistance. The measured electrical responsivity of the disordered graphene bolometer reaches 6 × 106 V/W at 1.5 K, corresponding to an optical responsivity of 1.6 × 105 V/W. The deduced electrical noise equivalent power is 1.2 , corresponding to the optical noise equivalent power of 44 . The minimal device structure and no requirement for high mobility graphene make a step forward towards the applications of graphene hot electron bolometers.

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Section: Discussionmentioning

confidence: 99%

Highly sensitive hot electron bolometer based on disordered graphene

Han

Gao

Zhang

et al. 2013

Sci Rep

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“…With its pseudorelativistic band structure, graphene can efficiently absorb photons from a wide EM spectrum, making it attractive for expanding the availability of SPDs to applications in a broader frequency range. Compared with metals, the electron-phonon (EP) coupling and electronic specific heat capacity of monolayer graphene are extremely small [9,12] due to the shrinking density of states near its charge neutrality point (CNP). Therefore, a single photon absorbed by graphene can heat up the electrons significantly.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Josephson-Junction Single-Photon Detector

et al. 2017

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We propose to use graphene-based Josephson junctions (GJJs) to detect single photons in a wide electromagnetic spectrum from visible to radio frequencies. Our approach takes advantage of the exceptionally low electronic heat capacity of monolayer graphene and its constricted thermal conductance to its phonon degrees of freedom. Such a system could provide high-sensitivity photon detection required for research areas including quantum information processing and radio astronomy. As an example, we present our device concepts for GJJ single-photon detectors in both the microwave and infrared regimes. The dark count rate and intrinsic quantum efficiency are computed based on parameters from a measured GJJ, demonstrating feasibility within existing technologies.

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“…G raphene photodetectors rely on graphene for the absorption of light as well as the generation of an electrical signal through photovoltaic [1][2][3][4][5] , thermoelectric [6][7][8][9] or bolometric [10][11][12] mechanisms. However, the limited absorption in a single layer of graphene through inter-band transitions presents a key challenge 13 .…”

mentioning

confidence: 99%

Photocurrent in graphene harnessed by tunable intrinsic plasmons

et al. 2013

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Graphene's optical properties in the infrared and terahertz can be tailored and enhanced by patterning graphene into periodic metamaterials with sub-wavelength feature sizes. Here we demonstrate polarization-sensitive and gate-tunable photodetection in graphene nanoribbon arrays. The long-lived hybrid plasmon-phonon modes utilized are coupled excitations of electron density oscillations and substrate (SiO 2 ) surface polar phonons. Their excitation by s-polarization leads to an in-resonance photocurrent, an order of magnitude larger than the photocurrent observed for p-polarization, which excites electron-hole pairs. The plasmonic detectors exhibit photo-induced temperature increases up to four times as large as comparable two-dimensional graphene detectors. Moreover, the photocurrent sign becomes polarization sensitive in the narrowest nanoribbon arrays owing to differences in decay channels for photoexcited hybrid plasmon-phonons and electrons. Our work provides a path to light-sensitive and frequency-selective photodetectors based on graphene's plasmonic excitations.

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Bolometric response in graphene based superconducting tunnel junctions

Cited by 70 publications

References 22 publications

Highly sensitive hot electron bolometer based on disordered graphene

Highly sensitive hot electron bolometer based on disordered graphene

Graphene-Based Josephson-Junction Single-Photon Detector

Photocurrent in graphene harnessed by tunable intrinsic plasmons

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