研究目的
Investigating the feasibility of a large area coherent source using plasmonic nanoantenna gratings positioned near a dielectric waveguide for applications requiring controlled directivity of light emission.
研究成果
The study confirms the feasibility of a large area coherent source by using plasmonic nanoantenna gratings positioned near a dielectric waveguide. First experimental results validate the approach, with potential applications in holographic systems requiring controlled directivity of light emission.
研究不足
The study identifies coupling mechanisms between nanoantenna chains and surface lattice modes for the first time in a waveguiding excitation configuration, suggesting areas for further optimization and understanding.
1：Experimental Design and Method Selection:
The study proposes an emitter structure composed of a plasmonic nanoantennas periodic grating coupled to a monomode dielectric Si3N4 waveguide embedded in a homogenous SiO2 medium. The Bragg grating function of each scatterer controls the directivity of the beam, whereas the localized plasmonic resonance of nanoantenna monitors the coupling efficiency.
2：Sample Selection and Data Sources:
The samples include an array of connected waveguides covering the surface of a glass substrate with discretized plasmonic nanoantennas positioned at specific locations.
3：List of Experimental Equipment and Materials:
Silver NP chain, silicon nitride waveguide, SiO2 medium.
4：Experimental Procedures and Operational Workflow:
The study involves positioning up to 8 emitters in series to deliver similar emission diagram in shape and intensity.
5：Data Analysis Methods:
Experimental and numerical far field map of emitted light at 633 nm was analyzed to validate the approach.
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