Author:
Park Daniel J.,Zhang Chuan,Ku Jessie C.,Zhou Yu,Schatz George C.,Mirkin Chad A.
Abstract
Three-dimensional dielectric photonic crystals have well-established enhanced light–matter interactions via high Q factors. Their plasmonic counterparts based on arrays of nanoparticles, however, have not been experimentally well explored owing to a lack of available synthetic routes for preparing them. However, such structures should facilitate these interactions based on the small mode volumes associated with plasmonic polarization. Herein we report strong light-plasmon interactions within 3D plasmonic photonic crystals that have lattice constants and nanoparticle diameters that can be independently controlled in the deep subwavelength size regime by using a DNA-programmable assembly technique. The strong coupling within such crystals is probed with backscattering spectra, and the mode splitting (0.10 and 0.24 eV) is defined based on dispersion diagrams. Numerical simulations predict that the crystal photonic modes (Fabry–Perot modes) can be enhanced by coating the crystals with a silver layer, achieving moderate Q factors (∼102) over the visible and near-infrared spectrum.
Funder
DOD | Air Force Office of Scientific Research
DOD | Office of Naval Research
U.S. Department of Energy
National Science Foundation
DOE | Argonne National Laboratory, Office of Science
Publisher
Proceedings of the National Academy of Sciences
Cited by
100 articles.
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