Quantum fluctuations of the current in a tunnel junction at optical frequencies

We have investigated the mechanism at the origin of the infra-red radiation emitted by a biased tunnel junction by detecting photons at frequencies \(\nu

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Veröffentlicht in:	arXiv.org 2017-11
Hauptverfasser:	Février, Pierre, Gabelli, Julien
Format:	Artikel
Sprache:	eng
Schlagworte:	Dependence Electric potential Energy dissipation Energy transmission Photon emission Photons Tunnel junctions Variation
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description	We have investigated the mechanism at the origin of the infra-red radiation emitted by a biased tunnel junction by detecting photons at frequencies \(\nu
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To address this regime, the bias voltage $V$ exceeds one volt and the potential profile of the tunnel barrier is driven far from its equilibrium state. As a consequence, the $I(V)$ characteristic of the junction is strongly nonlinear. At optical frequencies, the transport through the junction cannot be simply expressed in term of the dc current and the current fluctuations are no longer described by the fluctuation-dissipation relation. Taking into account the energy and voltage dependence of the transmission of the tunnel junction in a Landauer-B\"{u}ttiker scattering approach, we experimentally demonstrate that the photon emission results from the fluctuations of the current inside the tunneling barrier.</description><identifier>EISSN: 2331-8422</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Dependence ; Electric potential ; Energy dissipation ; Energy transmission ; Photon emission ; Photons ; Tunnel junctions ; Variation</subject><ispartof>arXiv.org, 2017-11</ispartof><rights>2017. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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As a consequence, the $I(V)$ characteristic of the junction is strongly nonlinear. At optical frequencies, the transport through the junction cannot be simply expressed in term of the dc current and the current fluctuations are no longer described by the fluctuation-dissipation relation. 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To address this regime, the bias voltage $V$ exceeds one volt and the potential profile of the tunnel barrier is driven far from its equilibrium state. As a consequence, the $I(V)$ characteristic of the junction is strongly nonlinear. At optical frequencies, the transport through the junction cannot be simply expressed in term of the dc current and the current fluctuations are no longer described by the fluctuation-dissipation relation. Taking into account the energy and voltage dependence of the transmission of the tunnel junction in a Landauer-B\"{u}ttiker scattering approach, we experimentally demonstrate that the photon emission results from the fluctuations of the current inside the tunneling barrier.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><oa>free_for_read</oa></addata></record>
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subjects	Dependence Electric potential Energy dissipation Energy transmission Photon emission Photons Tunnel junctions Variation
title	Quantum fluctuations of the current in a tunnel junction at optical frequencies
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