论文标题
非谐振和谐振隧道连接中的光的热来源
Thermal origin of light emission in non-resonant and resonant tunnel junctions
论文作者
论文摘要
电子隧道与光发射有关。为了阐明其生成机制，我们提供了一种新型的实验性ANSATZ，该实验使用了固定距离上皮石墨烯作为金属电极。与以前的实验相反，这允许从隧道连接处传播的无尺度光，从而使可见的红外发射光谱对可见的校准进行了可靠的校准以及对所涉及参数依赖性的详细分析。在开放的非谐振几何形状中，发出的光完美地以普朗克频谱为特征。在电磁谐振环境中，将谐振辐射添加到热频谱中，两者均强度严格成比例。与简单的热传导模型完全一致，我们提供了证据表明，在这两种情况下，光发射都来自与线性电磁环境相互作用的热电子子系统。这些非常清晰的结果应解决对纳米接触中光发射机制的任何歧义。
Electron tunneling is associated with light emission. In order to elucidate its generating mechanism, we provide a novel experimental ansatz that employs fixed-distance epitaxial graphene as metallic electrodes. In contrast to previous experiments, this permits an unobscured light spread from the tunnel junction, enabling both a reliable calibration of the visible to infrared emission spectrum and a detailed analysis of the dependence of the parameters involved. In an open, non-resonant geometry, the emitted light is perfectly characterized by a Planck spectrum. In an electromagnetically resonant environment, resonant radiation is added to the thermal spectrum, both being strictly proportional in intensity. In full agreement with a simple heat conduction model, we provide evidence that in both cases the light emission stems from a hot electronic subsystem in interaction with its linear electromagnetic environment. These very clear results should resolve any ambiguity about the mechanism of light emission in nano contacts.
