Lateral and temporal dependence of the transport through an atomic gold contact under light irradiation: signature of propagating surface plasmon polaritons.
Lateral and temporal dependence of the transport through an atomic gold contact under light irradiation: signature of propagating surface plasmon polaritons.
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DOI：
10.1021/nl502165y
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发表时间：
2014-08
期刊：
影响因子：
10.8
通讯作者：
D. Benner;J. Boneberg;P. Nürnberger;R. Waitz;P. Leiderer;E. Scheer
中科院分区：
文献类型：
--
作者：
D. Benner;J. Boneberg;P. Nürnberger;R. Waitz;P. Leiderer;E. Scheer
金属点接触（MPCs）的尺寸与传导电子的费米波长相当，可作为电子波导并可作为等离子体发射器。本文研究了激光照射下MPCs的光学响应和电导响应。为了阐明表面等离子激元（SPPs）的作用，我们将线光栅集成到引线中，以提高SPP激发效率。通过分析空间、极化和时间依赖性，我们确定了两个SPP贡献，我们分别将其归因于传输SPP和衰减SPP。结果表明，SPPs在金属纳米结构中具有光学控制输运的作用，对设计光纳米电子器件具有重要意义。
Metallic point contacts (MPCs) with dimensions comparable to the Fermi wavelength of conduction electrons act as electronic waveguides and might operate as plasmon transmitters. Here we present a correlated study of optical and conductance response of MPCs under irradiation with laser light. For elucidating the role of surface plasmon polaritons (SPPs), we integrate line gratings into the leads that increase the SPP excitation efficiency. By analyzing spatial, polarization, and time dependence, we identify two SPP contributions that we attribute to transmitted and decaying SPPs, respectively. The results demonstrate the role of SPPs for optically controlling the transport in metallic nanostructures and are important for designing opto-nanoelectronic devices.