Effective medium metasurfaces using nanoimprinting of the refractive index: design, performance, and predictive tolerance analysis

Production of flat optics incorporating subwavelength features, particularly at visible frequencies, remains a significant challenge. Here, we establish a framework for the design of effective medium metasurfaces (EMM), relying on nanoimprinting of mesoporous silicon to realize a patterned refractiv...

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Bibliographic Details
Published in:Optical materials express 2024-04, Vol.14 (4), p.847
Main Authors: Panipinto, Matthew, Ryckman, Judson D.
Format: Article
Language:English
Subjects:
Finite difference time domain method
Fresnel lenses
Metasurfaces
Neural networks
Performance prediction
Refractivity
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Summary:Production of flat optics incorporating subwavelength features, particularly at visible frequencies, remains a significant challenge. Here, we establish a framework for the design of effective medium metasurfaces (EMM), relying on nanoimprinting of mesoporous silicon to realize a patterned refractive index n (x,y) corresponding to an arbitrary transmitted phase profile ϕ (x,y). The method is used to design the stamp profile required to produce a Fresnel lens and the theoretical performance of the metalens is examined using the finite-difference time-domain method. Additionally, we demonstrate neural network aided Monte Carlo analysis as a method to model the effects of metasurface fabrications errors on EMM performance and process yield.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.515617