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Proceedings Paper

Spatial frequency characterisation of a far-field superlens to facilitate general purpose imaging
Author(s): Farzaneh Fadakar Masouleh; Paul Teal; Ciaran Moore
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Paper Abstract

Based on sub-wavelength energy concentration and enhancement of evanescent fields, far-field super-lenses (FSLs) were proposed recently as a means to achieve super-resolution imaging and thus improve the accuracy and resolution of optical microscopy. Comprised of a thin-film plasmonic enhancement layer and a diffraction grating, the performance of FSLs depends greatly on the geometry and size of its constituent parts. In this paper, we aim to characterize the resolution capabilities of FSLs in a novel and meaningful way, while also exploring the effects of non-ideal grating geometries due to fabrication limitations on imaging performance. We use finite element modelling to explore trapezoidal, inverse-trapezoidal, circular, rounded rectangular, and rectangular grating profiles and present a transfer function that quantifies the performance of these grating profiles in terms of their transmission at different wavenumbers.

Paper Details

Date Published: 27 April 2016
PDF: 7 pages
Proc. SPIE 9889, Optical Modelling and Design IV, 98890I (27 April 2016); doi: 10.1117/12.2227923
Show Author Affiliations
Farzaneh Fadakar Masouleh, Victoria Univ. of Wellington (New Zealand)
Paul Teal, Victoria Univ. of Wellington (New Zealand)
Ciaran Moore, Victoria Univ. of Wellington (New Zealand)

Published in SPIE Proceedings Vol. 9889:
Optical Modelling and Design IV
Frank Wyrowski; John T. Sheridan; Youri Meuret, Editor(s)

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