Schörner Christian, Adhikari Subhasis, Lippitz Markus
Experimental Physics III , University of Bayreuth , D-95447 Bayreuth , Germany.
Nano Lett. 2019 May 8;19(5):3238-3243. doi: 10.1021/acs.nanolett.9b00773. Epub 2019 Apr 26.
Plasmonic waveguides are key elements in nanophotonic devices, serving as optical interconnects between nanoscale light sources and detectors. Multimode operation in plasmonic two-wire transmission lines promises important degrees of freedom for near-field manipulation and information encoding. However, highly confined plasmon propagation along gold nanostructures is typically limited to the near-infrared region due to ohmic losses, excluding all visible quantum emitters from plasmonic circuitry. We report on the top-down fabrication of complex plasmonic nanostructures in single-crystalline silver plates. We demonstrate the controlled remote excitation of a small ensemble of fluorophores by a set of waveguide modes and the emission of the visible luminescence into the waveguide with high efficiency. This approach opens up the study of a nanoscale light-matter interaction between complex plasmonic waveguides and a large variety of quantum emitters available in the visible spectral range.
表面等离子体波导是纳米光子器件中的关键元件，可作为纳米级光源与探测器之间的光互连。表面等离子体双线传输线中的多模操作有望为近场操纵和信息编码提供重要的自由度。然而，由于欧姆损耗，沿金纳米结构的高度受限的表面等离子体传播通常限于近红外区域，这使得表面等离子体电路无法使用所有可见量子发射器。我们报告了在单晶银板中自上而下制造复杂表面等离子体纳米结构的方法。我们展示了通过一组波导模式对一小群荧光团进行可控的远程激发，并将可见发光高效地发射到波导中。这种方法开启了对复杂表面等离子体波导与可见光谱范围内各种可用量子发射器之间纳米级光与物质相互作用的研究。
