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- W3099580366 abstract "Abstract Multilevel diffractive lenses (MDLs) have emerged as an alternative to both conventional diffractive optical elements (DOEs) and metalenses for applications ranging from imaging to holographic and immersive displays. Recent work has shown that by harnessing structural parametric optimization of DOEs, one can design MDLs to enable multiple functionalities like achromaticity, depth of focus, wide-angle imaging, etc. with great ease in fabrication. Therefore, it becomes critical to understand how fabrication errors still do affect the performance of MDLs and numerically evaluate the trade-off between efficiency and initial parameter selection, right at the onset of designing an MDL, i.e., even before putting it into fabrication. Here, we perform a statistical simulation-based study on MDLs (primarily operating in the THz regime) to analyse the impact of various fabrication imperfections (single and multiple) on the final structure as a function of the number of ring height levels. Furthermore, we also evaluate the performance of these same MDLs with the change in the refractive index of the constitutive material. We use focusing efficiency as the evaluation criterion in our numerical analysis; since it is the most fundamental property that can be used to compare and assess the performance of lenses (and MDLs) in general designed for any application with any specific functionality." @default.
- W3099580366 created "2020-11-23" @default.
- W3099580366 creator A5010634052 @default.
- W3099580366 creator A5014233778 @default.
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- W3099580366 date "2020-09-03" @default.
- W3099580366 modified "2023-10-12" @default.
- W3099580366 title "Impact of fabrication errors and refractive index on multilevel diffractive lens performance" @default.
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- W3099580366 doi "https://doi.org/10.1038/s41598-020-71480-2" @default.
- W3099580366 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7471910" @default.
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- W3099580366 hasPublicationYear "2020" @default.
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