Focusing and phase compensation of paraxial beams by a left-handed material slab

Details Focusing and phase compensation of paraxial beams by a left-handed material slab Focusing and phase compensation of paraxial beams by a left-handed material slab

2006-05-11

arxiv.org/abs/physics/0605093v1

Optics Communication 266, 327 (2006).

Physics

Optics

12 pages, 4 figures

Scientific paper

10.1016/j.optcom.2006.04.031

On the basis of angular spectrum representation, a formalism describing paraxial beams propagating through an isotropic left-handed material (LHM) slab is presented. The treatment allows us to introduce the ideas of beam focusing and phase compensation by LHM slab. Because of the negative refractive index of LHM slab, the inverse Gouy phase shift and the negative Rayleigh length of paraxial Gaussian beam are proposed. It is shown that the phase difference caused by the Gouy phase shift in right-handed material (RHM) can be compensated by that caused by the inverse Gouy phase shift in LHM. If certain matching conditions are satisfied, the intensity and phase distributions at object plane can be completely reconstructed at the image plane.

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