Flat lens without optical axis: Theory of imaging

Details Flat lens without optical axis: Theory of imaging Flat lens without optical axis: Theory of imaging

2005-01-28

arxiv.org/abs/cond-mat/0501715v2

Optics Express 13, 10673 -10680 (2005).

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures

Scientific paper

10.1364/OPEX.13.010673

We derive a general theory for imaging by a flat lens without optical axis. We show that the condition for imaging requires a material having elliptic dispersion relations with negative group refraction, equivalent to an effective anisotropic refractive index n(theta). Imaging can be achieved with both negative (n<0) and positive (n>0) refractive indices. The Veselago-Pendry lens is a special case with isotropic negative refractive index of n(theta)=-1. Realizations of the imaging conditions using anisotropic media and inhomogeneous media, particularly photonic crystals, are discussed. Numerical examples of imaging and requirements for sub-wavelength imaging are also presented.

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