Light-harvesting structures in natural photosynthetic organelles, such as those in purple bacteria, consist of light-responsive chromophores in densely packed antennae systems with organized nanostructures. Inspired by these biological systems, we've created organic materials with densely packed J-aggregates in a polymeric matrix, mimicking the optical role of a protein scaffold. These materials exhibit tunable polaritonic properties from visible to infrared. Drawing from the structure of light-harvesting complexes in purple bacteria, we've studied interactions between light and J-aggregate-based nanorings. Electromagnetic simulations show these nanorings act as resonators, confining light beyond subwavelength scales. These findings enable bio-inspired building components for metamaterials spanning the visible to infrared spectrum in an all-organic platform, offering a fresh perspective on nanoscale light-matter interactions in densely packed organic materials in biological organisms, including photosynthetic organelles.
In this work, we show how J-aggregate doped polymers can establish a novel polymer organic active photonic platform for nanophotonics. These polymer materials are able to confine light at nanoscale supporting Surface Exciton Polaritons (SEP) similar to Surface Plasmon Polaritons. This novel organic platform can exploit the fabrication tools of supramolecular chemistry, to control and design J-aggregates which give access to light-confinement at desirable new wavelengths across the visible and near-infrared; extending plasmonics beyond the fixed properties of metals by a new means.
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