Negative Index of Refraction in Optical Metamaterials

Details Negative Index of Refraction in Optical Metamaterials Negative Index of Refraction in Optical Metamaterials

2005-04-13

arxiv.org/abs/physics/0504091v2

Physics

Optics

an improved version (17 pages, 5 figures) with a new sample and additional measurements

Scientific paper

10.1364/OL.30.003356

An array of pairs of parallel gold nanorods is shown to have a negative refractive index n'=-0.3 at the optical communication wavelength of 1.5 micron. This effect results from the plasmon resonance in the pairs of nanorods for both the electric and magnetic components of light. The refractive index is retrieved from the direct phase and amplitude measurements for transmission and reflection, which are all in excellent agreement with our finite difference time domain simulations. The refraction critically depends on the phase of the transmitted wave, which emphasizes the importance of phase measurements in finding n'.

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