论文标题
光学矫正在光子辅助隧道电流中的作用
Role of optical rectification in photon-assisted tunneling current
论文作者
论文摘要
我们研究金属隧道连接处的光学矫正。我们考虑在kretschmann配置中的平面连接点，并在红外照明下测量$λ= 1.5 \，μ\ mathrm {m {m} $的光子辅助隧道。为了解决光学整流起源的显微镜机制，我们比较了在电压范围内测量的光子辅助电流和电流 - 电压特性大于$ V_0 = \ frac {hc} {hc} {eλ} = 0.825 \ 0.825 \，\，\，\ mathrm {v} $。基于电子和光子之间的能量量子的交换，实验结果与塔克理论不一致，并根据光子辅助过程引起的直流电流，以移位特性$ i（v）$ i（v）$和$ i（v \ pm v_0）$的线性组合而言。相反，我们证明了照明能力主要用于加热，并且矫正主要是由于光学频率以隧道连接的非线性而产生的。
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 $λ= 1.5\, μ\mathrm{m}$. 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 $V_0=\frac{hc}{eλ}=0.825 \, \mathrm{V}$. 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.
