研究目的
Investigating the morphological transition from disconnected patchy silver coated nanosphere particles to a connected Ag nanohole sheet on close-packed nanosphere monolayers and its impact on optical properties.
研究成果
The combination of nanosphere lithography and glancing angle deposition can produce high-quality plasmonic nanohole sheets with superior EOT performance. The EOT peak wavelength is independent of the Ag thickness and proportional to the nanosphere diameter, with high transmission values and quality factors achievable.
研究不足
The study is limited by the difficulty in directly observing the morphological transition due to the poor depth profiling capability of SEM and the noise or charging effect. Additionally, the optical properties are only characterized for Ag nanostructures.
1：Experimental Design and Method Selection:
The study combines nanosphere lithography and glancing angle deposition to fabricate plasmonic nanostructures.
2：Sample Selection and Data Sources:
Polystyrene nanospheres with diameters of 350, 500, 750, and 1000 nm were used to form monolayers.
3：List of Experimental Equipment and Materials:
A home-built electron beam evaporation system was used for Ag deposition. SEM and UV-Vis-NIR spectrometer were used for characterization.
4：Experimental Procedures and Operational Workflow:
Ag was deposited at a fixed incident angle of 55° with varying thicknesses. Optical transmission and reflection properties were measured.
5：Data Analysis Methods:
FDTD calculations were performed to understand the optical response of the fabricated nanostructures.
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