Electrically Driven Optical Antennas Based on Template Dielectrophoretic Trapping.,ACS Nano

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Electrically Driven Optical Antennas Based on Template Dielectrophoretic Trapping.
ACS Nano ( IF 15.8 ) Pub Date : 2019-11-25 , DOI: 10.1021/acsnano.9b06376
Xiaobo He ₁ , Jibo Tang ₂ , Huatian Hu ₂ , Junjun Shi ₂ , Zhiqiang Guan ₁ , Shunping Zhang ₁ , Hongxing Xu _{1,

2}

Affiliation

An electrically driven optical antenna (EDOA) provides a nanoscale light-emitting scheme that is appealing for biosensors, plasmonic displays, and on-chip optoelectronic circuits. The EDOA (consisting of metal nanoparticles (NPs)) excited by inelastic tunneling electrons has attracted broad interest due to its terahertz modulation bandwidth and microelectronics-compatible dimensions. Currently, the efficient fabrication of EDOA is hampered by the ultrasmall size of NPs and the requirement of controllable preparation. Here, we overcome this limitation by accurately positioning thiol-covered gold NPs onto predesigned electrodes using dielectrophoresis trapping. The combination of a high-quality molecule tunnel barrier and the template trapping ensures that the EDOA can operate stably in ambient conditions. More importantly, the template trapping allows fabrication of EDOA with different numbers and arrangements of NPs by controlling the size and orientation of the template. This technology provides a way to fabricate controllable optoelectronic devices based on NPs and is promising for compact and smart photonic devices.

中文翻译：

基于模板介电泳陷获的电驱动光天线。

电驱动的光学天线（EDOA）提供了一种纳米尺度的发光方案，该方案吸引了生物传感器，等离子显示器和片上光电电路。由于其太赫兹调制带宽和微电子兼容尺寸，由非弹性隧穿电子激发的EDOA（由金属纳米颗粒（NPs）组成）引起了广泛的关注。当前，由于纳米粒子的超小尺寸和可控制备的要求，妨碍了EDOA的有效制备。在这里，我们通过介电电泳将巯基覆盖的金纳米粒子精确定位到预先设计的电极上，从而克服了这一局限性。高质量分子隧道势垒和模板捕获的结合确保了EDOA可以在环境条件下稳定运行。更重要的是，模板捕获可通过控制模板的大小和方向来制造具有不同数量和排列的NP的EDOA。这项技术提供了一种制造基于NP的可控光电器件的方法，并有望用于紧凑和智能的光子器件。

更新日期：2019-11-28

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