Spatial frequency characterisation of a far-field superlens to facilitate general purpose imaging

Farzaneh Fadakar Masouleh; Paul Teal; Ciaran Moore

doi:10.1117/12.2227923

27 April 2016 Spatial frequency characterisation of a far-field superlens to facilitate general purpose imaging

Farzaneh Fadakar Masouleh, Paul Teal, Ciaran Moore

Proceedings Volume 9889, Optical Modelling and Design IV; 98890I (2016) https://doi.org/10.1117/12.2227923
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

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.

Citation Download Citation

Farzaneh Fadakar Masouleh, Paul Teal, and Ciaran Moore "Spatial frequency characterisation of a far-field superlens to facilitate general purpose imaging", Proc. SPIE 9889, Optical Modelling and Design IV, 98890I (27 April 2016); https://doi.org/10.1117/12.2227923

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