Effect of Ag Nanocube Optomechanical Modes on Plasmonic Surface Lattice Resonances
| Autor: | Yusuke Yamauchi, Sigitas Tamulevičius, Mindaugas Juodėnas, Tomas Tamulevičius, Joel Henzie, Domantas Peckus |
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| Přispěvatelé: | American Chemical Society |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Physics::Optics Nanoparticle 02 engineering and technology engineering.material 01 natural sciences Molecular physics plasmonics 010309 optics Lattice (order) 0103 physical sciences Physics::Atomic and Molecular Clusters Electrical and Electronic Engineering Plasmon Optomechanics lattice plasmons surface lattice resonances self-assembly 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics optomechanics Electronic Optical and Magnetic Materials engineering Noble metal Self-assembly photoacoustics 0210 nano-technology Biotechnology |
| Zdroj: | ACS Photonics. 7:3130-3140 |
| ISSN: | 2330-4022 |
| DOI: | 10.1021/acsphotonics.0c01187 |
| Popis: | Noble metal nanoparticles patterned in ordered arrays can interact and generate hybrid plasmonic–photonic resonances called surface lattice resonances (SLRs). Dispersion curves help explain how the Bragg coupling conditions and radiation patterns create dipolar and quadrupolar SLRs, but they assume that the nanoparticles are static structures, which is inaccurate at ultrafast time scales. In this article, we examine how local surface plasmon resonances (LSPRs) supported by cubic Ag nanocrystals are modulated by ultrafast photophysical processes that generate optomechanical modes. We use transient absorbance spectroscopy measurements to demonstrate how the LSPRs of the nanoparticles modulate the SLR of the array over time. Two primary mechanical breathing modes of Ag nanocubes were identified in the data and input into electromagnetic models to examine how fluctuations in shape affect the dispersion diagram. Our observations demonstrate the impact of optomechanical processes on the photonic length scale, which should be considered in the design of SLR-based devices. |
| Databáze: | OpenAIRE |
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