Spectral and Directional Reshaping of Fluorescence in Large Area Self-Assembled Plasmonic–Photonic Crystals

• Published in: Nano letters Vol. 13; no. 2; pp. 378 - 386
• Main Authors: Ding, Boyang, Hrelescu, Calin, Arnold, Nikita, Isic, Goran, Klar, Thomas A
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 13.02.2013
• Subjects: Arrays; Collective excitations (including excitons, polarons, plasmons and other charge-density excitations); Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Crystals; Dyes; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Exact sciences and technology; Fluorescence; Fundamental areas of phenomenology (including applications); Materials science; Methods of nanofabrication; Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals; Nanostructure; Optical materials; Optics; Photonic bandgap materials; Physics; Reflection; Self-assembly; Silver; Spectra; Structure of solids and liquids; crystallography; Surface and interface electron states; Voids; void plasmons; Purcell effect; localized surface plasmon resonances; Bloch modes; Plasmonic crystal; fluorescence reshaping; Crystal defects; Organic dye; Photonic crystals; Doping; Fluorescence; Voids; Silver; Hexagonal lattices; Self-assembly; Reflection spectrum; Plasmons; Nanosphere; Absorption spectra; Arrays
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl3035114

Spectral and directional reshaping of fluorescence from dye molecules embedded in self-assembled hybrid plasmonic–photonic crystals has been examined. The hybrid crystals comprise two-dimensional hexagonal arrays of dye-doped dielectric nanospheres, capped with silver semishells. Comparing the reshaped fluorescence spectra with measured transmission/reflection spectra and numerical calculations reveals that the spectral and directional reshaping of fluorescence is the result of its coupling to photonic crystal Bloch modes and to void plasmons localized inside the silver caps.