Graphene-based Bolometers

Du, Xu; Prober, D. E.; Vora, Heli; McKitterick, Chris

doi:10.48550/arxiv.1308.4065

Cited by 2 publications

(2 citation statements)

References 52 publications

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“…The small heat capacity, the weak electron-phonon coupling, and the low electrical resistance of graphene are intrinsic properties that can strongly improve the performance of such detectors. Du et al [ 43 ] analysed the most recent theoretical and experimental achievements in the field of cryogenic graphene-based bolometers. Their study considered the phonon cooling mechanism and its dependence on temperature, the doping and disorder of graphene structures, and the various approaches used to realise bolometric detectors.…”

Section: Emerging Applications and Open Challengesmentioning

confidence: 99%

From Protosolar Space to Space Exploration: The Role of Graphene in Space Technology and Economy

2023

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This paper aims to analyse the state-of-the-art of graphene-based materials and devices designed for use in space. The goal is to summarise emerging research studies, contextualise promising findings, and discuss underway strategies to address some specific space-related problems. To complete our overview of graphene-based technology and address the relevance of graphene in the wide scenario of the space economy, we also provide an analysis of worldwide patents and the scientific literature for aerospace applications in the period 2010–2021. We analysed global trends, country distributions, top assignees, and funding sponsors, evidencing a general increase for the period considered. These indicators, integrated with market information, provide a clear evaluation of the related technology trends and readiness levels.

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Section: Emerging Applications and Open Challengesmentioning

confidence: 99%

From Protosolar Space to Space Exploration: The Role of Graphene in Space Technology and Economy

2023

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“…The small electronic heat capacity, resulting from the ultra-small volume of the material combined with the low electron density of states, can be estimated to be C e ~10 −21 J/K for a 1 m 2 graphene flake at T~4 K and a typical carrier density of 10 12 cm -2 [4]. The weak phonon coupling makes it possible to achieve low thermal conductance (G) and hence high intrinsic sensitivity, as characterized by the thermal fluctuation limited noise equivalent power NEP th = √4k B T 2 G. While details of the device design requires careful balancing of various parameters [3,10,11], it is generally acknowledged that by combining small heat capacity and low thermal conductance, graphene offers promise for building bolometers which simultaneously achieve high sensitivity and fast response with a small time constant.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear vs. bolometric radiation response and phonon thermal conductance in graphene-superconductor junctions

Vora

Nielsen

2014

Journal of Applied Physics

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Graphene is a promising candidate for building fast and ultra-sensitive bolometric detectors due to its weak electron-phonon coupling and low heat capacity. In order to realize a practical graphene-based bolometer, several important issues, including the nature of radiation response, coupling efficiency to the radiation and the thermal conductance need to be carefully studied.Addressing these issues, we present graphene-superconductor junctions as a viable option to achieve efficient and sensitive bolometers, with the superconductor contacts serving as hot electron barriers. For a graphene-superconductor device with highly transparent interfaces, the resistance readout in the presence of radio frequency radiation is dominated by non-linear response. On the other hand, a graphene-superconductor tunnel device shows dominantly bolometric response to radiation. For graphene devices fabricated on SiO2 substrates, we confirm recent theoretical predictions of T 2 temperature dependence of phonon thermal conductance in the presence of disorder in the graphene channel at low temperatures.

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Graphene-based Bolometers

Cited by 2 publications

References 52 publications

From Protosolar Space to Space Exploration: The Role of Graphene in Space Technology and Economy

From Protosolar Space to Space Exploration: The Role of Graphene in Space Technology and Economy

Nonlinear vs. bolometric radiation response and phonon thermal conductance in graphene-superconductor junctions

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