Superoscillatory quartz lens with effective numerical aperture greater than one

Superoscillatory quartz lens with effective numerical aperture greater than one

We report super-resolution high-numerical-aperture and long-working-distance superoscillatory quartz lenses for focusing and imaging applications. At the wavelength of λ = 633 nm, the lenses have an effective numerical aperture of 1.25, a working distance of 200 μm, and a focus into a hotspot of 0.4...

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Bibliographic Details
Main Authors: Yuan, Guanghui, Lin, Y.-H., Tsai, D. P., Zheludev, Nikolay I.
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2020
Subjects:
Science::Physics
Quartz Lens
Effective Numerical Aperture
Online Access:https://hdl.handle.net/10356/144296
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Institution: Nanyang Technological University
Language: English
Description
Summary:We report super-resolution high-numerical-aperture and long-working-distance superoscillatory quartz lenses for focusing and imaging applications. At the wavelength of λ = 633 nm, the lenses have an effective numerical aperture of 1.25, a working distance of 200 μm, and a focus into a hotspot of 0.4λ. Confocal imaging with resolution determined by the superoscillatory hotspot size is experimentally demonstrated.

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