Negative refraction through an impedance-matched left-handed metamaterial slab

Abstract

We report the transmission and reflection characteristics of a two-dimensional (2D) left-handed metamaterial (LHM). A well-defined left-handed (LH) transmission band with a peak value of $-9.9\mathrm{dB}$ is obtained at frequencies where both effective permittivity and permeability are negative. A very sharp dip $(-38\mathrm{dB})$ at the reflection spectrum due to impedance matching at the surface of a 2D LHM is observed. Gaussian beam shifting experiments are performed to study the LH properties of a LHM structure. The structure has a negative refraction of electromagnetic waves in a certain frequency range. The negative refractive index values obtained for four different incident angles are in good agreement.

© 2006 Optical Society of America

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