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Hybrid cube-in-cup nanoantenna: towards ordered photonics
A V Gritsienko1, N S Kurochkin1, P V Lega2
1P. N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Pr., 119991 Moscow, Russia.
Nanotechnology
|September 30, 2021
Summary
Researchers developed a novel hybrid nanoantenna using quantum dots and silver nanocubes. This nanophotonic device significantly enhances light emission for high-speed quantum applications.
Area of Science:
- Nanophotonics
- Quantum Optics
- Plasmonics
Background:
- Developing high-speed quantum emitters at ambient temperature is a key nanophotonics goal.
- Plasmonic nanoparticles-on-mirror structures show promise for high-speed photon sources.
Purpose of the Study:
- Introduce a novel hybrid nanoantenna (HNA) for enhanced quantum emitter performance.
- Investigate the effect of a nanoparticle-in-cavity system on radiation characteristics.
Main Methods:
- Fabrication of silver nanocubes within metal cups using focused ion beam nanolithography.
- Integration of CdSe/CdS colloidal quantum dots (QDs) via drop-casting and spin coating.
- Spectral and time-resolved studies, alongside finite element method (FEM) simulations.
Main Results:
- Observed significant changes in QD radiation characteristics within the HNA.
- Demonstrated Purcell effect leading to increased fluorescence decay rate (≥30) and intensity (≥3).
- FEM simulations revealed cup wall influence on gap plasmon modes and electric field enhancement, with polarization-dependent behavior.
Conclusions:
- The proposed HNA enhances quantum emitter performance through plasmonic coupling.
- The design shows potential for applications in plasmonic sensors, display pixels, and single-photon sources.
