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Towards quantum-lim...
Towards quantum-limited coherent detection of terahertz waves in charge-neutral graphene
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- Lara Avila, Samuel, 1983 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,National Physical Laboratory (NPL),Chalmers Univ Technol, Sweden; Natl Phys Lab, England
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- Danilov, Andrey, 1961 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Sweden
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- Golubev, Dmitry (författare)
- Aalto-Yliopisto,Aalto University,Aalto Univ, Finland
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- He, Hans, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Sweden,Chalmers Univ Technol, Sweden
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- Kim, Kyung Ho, 1984 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Yakimova, Rositsa (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Lombardi, Floriana, 1967 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Sweden
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- Bauch, Thilo, 1972 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Sweden
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- Cherednichenko, Serguei, 1970 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Sweden
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- Kubatkin, Sergey, 1959 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Sweden
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(creator_code:org_t)
- 2019-08-05
- 2019
- Engelska.
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Ingår i: Nature Astronomy. - : Springer Science and Business Media LLC. - 2397-3366. ; 3:11, s. 983-988
- Relaterad länk:
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http://arxiv.org/pdf...
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https://doi.org/10.1...
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https://liu.diva-por... (primary) (Raw object)
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https://research.cha...
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https://doi.org/10.1...
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https://research.cha...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Spectacular advances in heterodyne astronomy1,2 have been largely due to breakthroughs in detector technology3. To exploit the full capacity of future terahertz (∼300 GHz–5 THz) telescope space missions4, new concepts of terahertz coherent receivers are needed, providing larger bandwidths and imaging capabilities with multipixel focal plane heterodyne arrays5. Here we show that graphene uniformly doped to the Dirac point, with material resistance dominated by quantum localization and thermal relaxation governed by electron diffusion, enables highly sensitive and wideband coherent detection of signals from 90 to 700 GHz and, prospectively, across the entire terahertz range. We measure on proof-of-concept graphene bolometric mixers an electron diffusion-limited gain bandwidth of 8 GHz (corresponding to a Doppler shift of 480 km s−1 at 5 THz) and intrinsic mixer noise temperature of 475 K (which would be equivalent to ~2 hν/kB at ν = 5 THz), limited by the residual thermal background in our setup. An optimized device will result in a mixer noise temperature as low as 36 K, with the gain bandwidth exceeding 20 GHz, and a local oscillator power of <100 pW. In conjunction with the emerging quantum-limited amplifiers at the intermediate frequency6,7, our approach promises quantum-limited sensing in the terahertz domain, potentially surpassing superconducting technologies, particularly for large heterodyne arrays
Ämnesord
- NATURVETENSKAP -- Fysik -- Acceleratorfysik och instrumentering (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Accelerator Physics and Instrumentation (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- hot electron bolometer
- terahertz
- graphene
- HEB
- mixer
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- Av författaren/redakt...
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Lara Avila, Samu ...
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Danilov, Andrey, ...
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Golubev, Dmitry
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He, Hans, 1989
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Kim, Kyung Ho, 1 ...
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Yakimova, Rosits ...
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visa fler...
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Lombardi, Floria ...
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Bauch, Thilo, 19 ...
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Cherednichenko, ...
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Kubatkin, Sergey ...
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Acceleratorfysik ...
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Materialteknik
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Annan fysik
- Artiklar i publikationen
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Nature Astronomy
- Av lärosätet
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Chalmers tekniska högskola
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RISE
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Linköpings universitet