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arXiv · 2205.10845

Role of optical rectification in photon-assisted tunneling current

P. Février·J. Basset·J. Estève·M. Aprili·J. Gabelli
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Abstract

We study the optical rectification in a metallic tunnel junction. We consider a planar junction in a Kretschmann configuration and measure the photon-assisted tunneling under infrared illumination at $\lambda= 1.5\, \mu \mathrm{m}$. To address the microscopic mechanism at the origin of the optical rectification, we compare the photon assisted current and the current-voltage characteristics of the junction measured on a voltage range much greater than $V_0=\frac{hc}{e\lambda}=0.825 \, \mathrm{V}$. The experimental results do not agree with the Tucker theory based on the exchange of energy quanta between electrons and photons and describing the dc current induced by photon-assisted processes in terms of a linear combination of the shifted characteristics $I(V)$ and $I(V\pm V_0)$. We show instead that the illumination power mainly goes into heating and that the rectification results mainly from the non-linearity of the tunnel junction at optical frequency.

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P. Février, J. Basset, J. Estève, M. Aprili, J. Gabelli. 2022-05-22. Role of optical rectification in photon-assisted tunneling current. https://arxiv.org/abs/2205.10845

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