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Laser fabricated ultrathin flat lens in sub-nanometer thick monolayer transition metal dichalcogenides crystal

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Abstract

A flat lens with sub-nanometer (7 Å) thickness is fabricated in a monolayer WS2 crystal flake using direct laser writing. The ultrathin lens is able to focus visible light with diffraction limited three-dimensional spatial resolution.

© 2016 Optical Society of America

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