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High-efficiency flat lenses shrink down to the nanoscale

02 Jun 2016
SEM image of the silicon nanofins
Sea of fins: the metalens with the titanium dioxide nanofins. (Courtesy: M Khorasaninejad et al., Capasso Lab)
Flat, high-efficiency, ultrathin metasurface lenses, that focus light to subwavelength spots, have b

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Tim Wogan is a science writer based in the UK
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