Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 112, Issue 4, Pages 977-981Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1422649112
Keywords
DNA-programmable assembly; 3D photonic crystals; plasmonics; deep subwavelength scale; strong coupling
Categories
Funding
- Air Force Office of Scientific Research Grant [FA9550-11-1-0275]
- Department of the Navy/Office of Naval Research Grant [N00014-11-1-0729]
- Non-equilibrium Energy Research Center, an Energy Frontier Research Center - US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences Grant [DE-SC0000989]
- Materials Research Science and Engineering Center program [National Science Foundation (NSF) Grant] at the Materials Research Center [DMR-1121262]
- Nanoscale Science and Engineering Center [EEC-0118025/003]
- NSF
- State of Illinois
- Northwestern University
- DOE [DE-AC02-06CH11357]
- Department of Defense for a National Defense Science and Engineering Graduate Fellowship
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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 (similar to 10(2)) over the visible and near-infrared spectrum.
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