Imaging by a sub-wavelength metallic lens with large field of view | Zendy

Shaoyun Yin | Zendy; Chongxi Zhou | Zendy; Xiangang Luo | Zendy; Chunlei Du | Zendy

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Imaging by a sub-wavelength metallic lens with large field of view

Author(s) -

Shaoyun Yin,

Chongxi Zhou,

Xiangang Luo,

Chunlei Du

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.002578

Subject(s) - optics , finite difference time domain method , lens (geology) , diffraction , aperture (computer memory) , focal length , cardinal point , electric field , wavelength , physics , numerical aperture , materials science , quantum mechanics , acoustics

The characteristics of the phase retardations and the invariability against the incident angles are investigated when light enters the rectangular holes with different sizes perforated on metallic film. A kind of metallic structure with a great potential in imaging is brought forward. The finite difference time domain (FDTD) method and the Rayleigh-Sommerfeld diffraction integrals are used to testify the imaging ability at different incident angles by examining the electric field on focal plane. The calculation results indicate that a quite large view of field lens can be achieved by increasing the number of the holes per unit area with the mentioned structure. A metallic structured lens with a 280 microm aperture and 240 microm focal length is designed and the view angle range of +/-15 degrees can be achieved.

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