Title: Easily realisable physically flat lens based on quasi-conformal transformation optics

Authors: Insang Yoo; Ilsung Seo; Yongshik Lee

Addresses: Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea ' Agency for Defense Development, Daejeon 305-152, Korea ' Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea

Abstract: We propose easily realisable physically flat lens based on quasi-conformal transformation optical theory. To alleviate the problems of requiring complex and resonant-type metamaterials for realisation as well as for optimisation of the geometry of the transformed space, simple geometries are chosen as candidates for warped spaces. Furthermore, the paths of the rays remain conserved even in 3-dimensionally extended lens by taking an azimuthal symmetry of the calculated refractive index. Numerical simulation results verify that the proposed lens, even after structural simplification for practical implementation, performs as desired.

Keywords: transformation optics; quasi-conformal transformation; flat lens; metamaterials; warped spaces; numerical simulation.

DOI: 10.1504/IJNT.2013.054207

International Journal of Nanotechnology, 2013 Vol.10 No.8/9, pp.653 - 660

Published online: 01 Aug 2013 *

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