Jostmeier Thorben, Mangold Moritz, Zimmer Johannes, Karl Helmut, Krenner Hubert J, Ruppert Claudia, Betz Markus
Opt Express. 2016 Jul 25;24(15):17321-31. doi: 10.1364/OE.24.017321.
We propose and implement a new concept for thermochromic plasmonic elements. It is based on vanadium dioxide (VO) nanocrystals located in the near field of surface plasmon polaritons supported by an otherwise unstructured gold thin film. When the VO undergoes the metal-insulator phase transition, the coupling conditions for conversion of light into propagating surface plasmon polaritons change markedly. In particular, we realize thermochromic plasmonic grating couplers with substantial switching contrast as well as tunable plasmonic couplers in a Kretschmann configuration. The use of VO nanocrystals permits highly repetitive switching and room temperature operation. Simulations based on the actual dielectric function of our VO nanocrystals agree well with the experiment.
我们提出并实现了一种用于热致变色等离子体元件的新概念。它基于位于由无结构金薄膜支持的表面等离激元极化激元近场中的二氧化钒（VO）纳米晶体。当VO经历金属-绝缘体相变时，光转换为传播表面等离激元极化激元的耦合条件会发生显著变化。特别是，我们实现了具有显著开关对比度的热致变色等离子体光栅耦合器以及Kretschmann配置中的可调谐等离子体耦合器。VO纳米晶体的使用允许高度重复的开关和室温操作。基于我们VO纳米晶体实际介电函数的模拟与实验结果吻合良好。
