Abstract
Plasmonic nanostructures with enhanced localized optical fields as well as narrow linewidths have driven advances in numerous applications. However, the active engineering of ultranarrow resonances across the visible regime-and within a single system-has not yet been demonstrated. This paper describes how aluminum nanoparticle arrays embedded in an elastomeric slab may exhibit high-quality resonances with linewidths as narrow as 3 nm at wavelengths not accessible by conventional plasmonic materials. We exploited stretching to improve and tune simultaneously the optical response of as-fabricated nanoparticle arrays by shifting the diffraction mode relative to single-particle dipolar or quadrupolar resonances. This dynamic modulation of particle-particle spacing enabled either dipolar or quadrupolar latticemodes to be selectively accessed and individually optimized. Programmable plasmon modes offer a robust way to achieve real-time tunable materials for plasmon-enhanced molecular sensing and plasmonic nanolasers and opens new possibilities for integrating with flexible electronics.
Original language | English (US) |
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Pages (from-to) | 14201-14206 |
Number of pages | 6 |
Journal | Proceedings of the National Academy of Sciences of the United States of America |
Volume | 113 |
Issue number | 50 |
DOIs | |
State | Published - Dec 13 2016 |
Funding
A.Y. acknowledges helpful discussions with Dr.M.B. Ross, D. Rhee, and M.P. Knudson. This work made use of the EPIC (Electron Probe Instrumentation Center) facility of the NUANCE Center (Northwestern University Atomic and Nanoscale Characterization Experimental Center) and Micro/ Nano Fabrication Facility at Northwestern University. This research was supported in part through the computational resources and staff contributions provided for the Quest high-performance computing facility at Northwestern University, which is jointly supported by the Office of the Provost, the Office for Research, and Northwestern University Information Technology. This work was supported by the National Science Foundation under Awards DMR- 1306514 (to T.W.O. and G.C.S.) and DMR-1121262 [Materials Research Science and Engineering Center (MRSEC) program] (to A.Y., M.R.B., T.W.O., and G.C.S.). Research for this paper was conducted with government support under FA9550-11-C-0028 (to A.J.H.) and awarded by Department of Defense, Air Force Office of Scientific Research, National Defense Science and Engineering Graduate Fellowship, 32 CFR 168a.
Keywords
- Flexible substrates
- Lattice plasmons
- Mode engineering
- Nanoparticles
- Plasmonics
ASJC Scopus subject areas
- General