等离子体电效应：共振金属结构中的光诱导电化学电势
The plasmoelectric effect: optically induced electrochemical potentials in resonant metallic structures
摘要：
我们描述了一种利用等离子体纳米结构中的共振吸收将光功率转换为直流电功率的策略。一个热力学分析的基本机制促使我们描述的现象，我们称之为等离子体电效应。功率转换是由光学产生的热对等离子体共振频率的偏移的依赖性引起的，等离子体共振频率的偏移随着电子密度的变化而发生。我们建模的全金属设备构造从10 nm半径的银球和预测的特征转换效率为14.3%下1千瓦m-2的强度，单频辐射。我们讨论了提高效率，宽带功率转换，并进一步应用这类新的光电子器件的策略。
英文摘要：
We describe a strategy for conversion of optical power into DC electrical power using resonant absorption in plasmonic nanostructures. A thermodynamic analysis of the underlying mechanism motivates our description of the phenomenon, which we term the plasmoelectric effect. Power conversion results from the dependence of optically generated heat on shifts of the plasmon resonance frequency that occur with changes of electron density. We model an all-metal device constructed from 10 nm radius silver spheres and predict a characteristic conversion efficiency of 14.3% under 1 kW m-2 intensity, single-frequency radiation. We discuss strategies for enhanced efficiency, broadband power conversion, and further applications of this new class of optoelectronic device.
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