研究目的
Investigating the coupling of deterministically activated quantum emitters in hexagonal boron nitride to plasmonic surface lattice resonances for applications in photonic quantum memories and long-range entanglement.
研究成果
The study presents a method for engineering room temperature quantum emission in a scalable platform where emitters are activated at array sites via substrate engineering. The coupling of emitter systems with photonic structures that support delocalized or propagating modes permits mutual interaction between distinct and spatially separated color centers, facilitating long-range energy transfer. Future work could focus on controlling the number of emitters coupling to the SLR mode via the size of the active region.
研究不足
The exact mechanism by which the hBN emitters are activated has not been isolated, with strain caused by the folding of the hBN around the nanopillars being a likely candidate. Additionally, pillar arrays with a pillar-to-pillar spacing of less than 100 nm were found to fuse together, limiting the types of systems that could be probed.
1：Experimental Design and Method Selection:
The study involves the fabrication of arrays of silver nanopillars via e-beam lithography to support plasmonic surface lattice resonances (SLRs). The interaction between hexagonal boron nitride (hBN) emission and the plasmonic arrays is studied by varying pillar diameters and pitches.
2：Sample Selection and Data Sources:
A 20 nm-thick hBN film, commercially available from Graphene Supermarket, is deposited on the Ag pillar substrate via a wet transfer protocol.
3：List of Experimental Equipment and Materials:
Equipment includes a Princeton Instruments SpectraPro HR 750 spectrometer, a custom-built confocal microscope, a piezo nanostage for raster scanning, and a 510 nm, 500 fs pulsed fiber laser (Toptica FemtoFiber pro TVIS) for excitation. Materials include PMMA film, silver for nanopillars, and alumina for passivation.
4：Experimental Procedures and Operational Workflow:
The process involves fabricating Ag nanopillar arrays, transferring hBN onto these arrays, and characterizing the optical properties before and after hBN transfer using angle-resolved spectra and photoluminescence measurements.
5：Data Analysis Methods:
The study analyzes the coupling of hBN emission to SLR modes by examining the modification in directionality and spectral intensity of the emission.
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