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Toward Cavity Quantum Electrodynamics with Hybrid Photon Gap-Plasmon States
Francesco Todisco1,2, Marco Esposito1,2, Simone Panaro3
1CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy.
ACS Nano
|December 28, 2016
Summary
Surface lattice resonances (SLRs) in aluminum nanoparticle gratings enhance light-matter interactions. This study demonstrates a significant increase in the Q/V ratio for SLRs, paving the way for advanced plasmonic applications.
Area of Science:
- Plasmonics and Nanophotonics
- Light-Matter Interactions
- Materials Science
Background:
- Surface lattice resonances (SLRs) emerge from coupling localized surface plasmons (LSPs) and diffractive surface waves (DSWs) in metallic nanoparticle gratings.
- SLRs offer potential for enhanced light-matter interactions due to reduced losses and higher Q factors compared to pure LSPs.
- A key unresolved question is the Q/V ratio gain of SLRs over uncoupled LSPs or DSWs for applications like cavity quantum electrodynamics.
Purpose of the Study:
- To investigate the Q/V ratio enhancement of SLRs in aluminum nanoparticle gratings.
- To determine if SLRs provide a significant gain in light-matter interaction efficiency compared to individual plasmonic modes.
- To explore the potential of these hybrid modes for cavity quantum electrodynamic effects and nonlinear optics.
Main Methods:
- Fabrication of aluminum nanoparticle square gratings with narrow-gap disk dimer unit cells.
- Experimental probing of hybrid plasmonic-photonic modes and their characteristics.
- Measurement of Rabi splitting resulting from the coupling of SLRs with a J-aggregated molecular dye.
Main Results:
- Demonstrated enhancement of the Q/V ratio for SLRs with a specific degree of plasmon hybridization.
- Reported a 5x increase in the Q/V ratio for gap-coupled LSPs compared to single nanoparticles.
- Observed an 80% increase in Rabi splitting for SLR-molecular dye coupling compared to DSW-like SLRs.
Conclusions:
- SLRs in tailored aluminum nanoparticle gratings offer a notable enhancement in the Q/V ratio, surpassing individual plasmonic modes.
- The demonstrated coupling efficiency, evidenced by enhanced Rabi splitting, validates the potential of these hybrid modes for efficient light-matter interactions.
- This work provides a foundation for developing advanced hybrid plasmonic platforms for exploiting excitonic nonlinearities and quantum effects.
Keywords:
aluminumplasmonplasmon-exciton-polaritonsplasmonic crystalsplexcitonsurface lattice resonanceMore Related Videos
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