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- W3033968215 abstract "Metasurface lenses provide an ultrathin platform in which to focus light, but weak light-matter interactions limit their dynamic tunability. Here we design submicron-thick, ultrahigh quality factor (high-Q) metalenses that enable dynamic modulation of the focal length and intensity. Using full-field simulations, we show that quality factors exceeding 5000 can be generated by including subtle, periodic perturbations within the constituent Si nanoantennas. Such high-Q resonances enable lens modulation based on the nonlinear Kerr effect, with focal lengths varying from 4 to 6.5 μm and focal intensities decreasing by half as input intensity increases from 0.1 to 1 mW/μm2. We also show how multiple high-Q resonances can be embedded in the lens response through judicious placement of the perturbations. Our high-Q lens design, with quality factors 2 orders of magnitude higher than existing lens designs, provides a foundation for reconfigurable, multiplexed, and hyperspectral metasurface imaging platforms." @default.
- W3033968215 created "2020-06-12" @default.
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- W3033968215 date "2020-06-04" @default.
- W3033968215 modified "2023-09-27" @default.
- W3033968215 title "Dynamic Focusing with High-Quality-Factor Metalenses" @default.
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- W3033968215 doi "https://doi.org/10.1021/acs.nanolett.0c01359" @default.
- W3033968215 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32497434" @default.
- W3033968215 hasPublicationYear "2020" @default.
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