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Optical gratings

Nano-engineered lenses

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High-performance, ultracompact lenses are needed in the quest to miniaturize optical systems. It now seems that carefully engineered subwavelength gratings can function as almost perfect mirrors with custom-designed focusing properties.

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Figure 1: Comparison of different focusing concepts.

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Chrostowski, L. Nano-engineered lenses. Nature Photon 4, 413–415 (2010). https://doi.org/10.1038/nphoton.2010.143

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