Couple molecular excitons to surface plasmon polaritons in an organic-dye-doped nanostructured cavity
Couple molecular excitons to surface plasmon polaritons in an organic-dye-doped nanostructured cavity
复制标题
DOI：
10.1063/1.4949562
复制
发表时间：
2016-05
影响因子：
4
通讯作者：
Kun Zhang;Wen-Bo Shi;Di Wang;Yue Xu;R. Peng;Renhao Fan;Qian-jin Wang;Mu Wang
中科院分区：
文献类型：
--
作者：
Kun Zhang;Wen-Bo Shi;Di Wang;Yue Xu;R. Peng;Renhao Fan;Qian-jin Wang;Mu Wang
在这项工作中，我们通过实验证明了在纳米结构腔中分子激子、表面等离子激子（SPPs）和Fabry-Perot （FP）模式之间的杂化耦合，其中j聚集体掺杂PVA（聚乙烯醇）层插入在银光栅和厚银膜之间。通过调整掺杂PVA层的厚度，FP腔模式有效地与分子激子耦合，形成两个几乎无色散的模式。色散SPPs随着入射角的增大与这两种模式相互作用，形成了三个杂化极化子带。通过从测量的角反射光谱中提取极化子带分量的混合分数，我们发现这三个波段都是由SPPs、FP模式和激子之间的强耦合引起的。这一工作对光-物质混合相互作用的相关研究具有启发作用，并在多模极化激子激光器和光谱学领域具有潜在的应用前景。
In this work, we demonstrate experimentally the hybrid coupling among molecular excitons, surface plasmon polaritons (SPPs), and Fabry-Perot (FP) mode in a nanostructured cavity, where a J-aggregates doped PVA (polyvinyl alcohol) layer is inserted between a silver grating and a thick silver film. By tuning the thickness of the doped PVA layer, the FP cavity mode efficiently couples with the molecular excitons, forming two nearly dispersion-free modes. The dispersive SPPs interact with these two modes while increasing the incident angle, leading to the formation of three hybrid polariton bands. By retrieving the mixing fractions of the polariton band components from the measured angular reflection spectra, we find all these three bands result from the strong coupling among SPPs, FP mode, and excitons. This work may inspire related studies on hybrid light-matter interactions, and achieve potential applications on multimode polariton lasers and optical spectroscopy.