Plasmon–Exciton Coupling Using DNA Templates

• DOI: 10.1021/acs.nanolett.6b03015
• Publication Date: 2016-08-17T11:39:03Z
• Authors: Eva-Maria Roller; Christos Argyropo...; Alexander Högele; Tim Liedl; Mauricio Pilo-Pais
• Keywords: Condensed Matter - Mesoscale and Nanoscale Physics; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Metal Nanoparticles; FOS: Physical sciences; DNA; 02 engineering and technology; Surface Plasmon Resonance; 0210 nano-technology

Coherent energy exchange between plasmons and excitons is a phenomenon that arises in the strong coupling regime resulting distinct hybrid states. The DNA-origami technique provides an ideal framework to custom-tune plasmon-exciton nanostructures. By employing this well controlled self-assembly process, we realized states by precisely positioning metallic nanoparticles defined spatial arrangement with fixed nanometer-sized interparticle spacing. Varying nanoparticle diameter 30 nm 60 while keeping their separation distance constant allowed us adjust plasmon resonance of structure accurately match frequency J-aggregate exciton. With system obtained studied far-field scattering at single-structure level. individual structures displayed normal mode splitting up 170 meV. tunability field confinement attained nanodimers on renders tool bottom-up assembly systems operating room temperature.