Electrical excitation of surface plasmon polaritons by inelastic tunneling electrons has been put forward as a potential nanosource that can be used in a variety of on-chip optoelectronic applications. In this article, we report a source based on an array of gold cylindrical antennas deposited on an alumina tunnel junction. This configuration has several merits: the junction can be operated under a high bias (>3 V) so that surface plasmons can be emitted in the visible region at room temperature; the antenna controls the surface plasmon emission spectrum; the radiative power per unit area is enhanced by more than two orders of magnitude compared to a planar junction.

中文翻译：

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纳米柱天线阵列产生可见表面等离子体极化激元

非弹性隧道电子对表面等离子体极化子的电激发已被提出作为一种潜在的纳米源，可用于各种片上光电应用。在本文中，我们报告了一个基于沉积在氧化铝隧道结上的金圆柱形天线阵列的源。这种配置有几个优点：结可以在高偏压（> 3 V）下工作，因此可以在室温下在可见光区发射表面等离子体；天线控制表面等离子体发射光谱；与平面结相比，单位面积的辐射功率提高了两个数量级以上。