Focusing of electromagnetic waves by a left-handed metamaterial flat lens

Koray Aydin; Irfan Bulu; Ekmel Ozbay

doi:10.1364/OPEX.13.008753

Focusing of electromagnetic waves by a left-handed metamaterial flat lens

Koray Aydin^*, Irfan Bulu, Ekmel Ozbay

^*Corresponding author for this work

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

Abstract

We present here the experimental results from research conducted on negative refraction and focusing by a two-dimensional (2D) left-handed metamaterial (LHM) slab. By measuring the refracted electromagnetic (EM) waves from a LHM slab, we find an effective refractive index of -1.86. A 2D scanning transmission measurement technique is used to measure the intensity distribution of the EM waves that radiate from the point source. The flat lens behavior of a 2D LHM slab is demonstrated for two different point source distances of d _s = 0.5λ, and λ. The full widths at half maximum of the focused beams are 0.36λ, and 0.4λ, respectively, which are both below the diffraction limit.

Original language	English (US)
Pages (from-to)	8753-8759
Number of pages	7
Journal	Optics Express
Volume	13
Issue number	22
DOIs	https://doi.org/10.1364/OPEX.13.008753
State	Published - Oct 31 2005

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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AU - Bulu, Irfan

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AB - We present here the experimental results from research conducted on negative refraction and focusing by a two-dimensional (2D) left-handed metamaterial (LHM) slab. By measuring the refracted electromagnetic (EM) waves from a LHM slab, we find an effective refractive index of -1.86. A 2D scanning transmission measurement technique is used to measure the intensity distribution of the EM waves that radiate from the point source. The flat lens behavior of a 2D LHM slab is demonstrated for two different point source distances of d s = 0.5λ, and λ. The full widths at half maximum of the focused beams are 0.36λ, and 0.4λ, respectively, which are both below the diffraction limit.

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Focusing of electromagnetic waves by a left-handed metamaterial flat lens

Abstract

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