Dual-Band Negative Index Metamaterial: Double-Negative at 813 nm and Single-Negative at 772 nm

Details Dual-Band Negative Index Metamaterial: Double-Negative at 813 nm and Single-Negative at 772 nm Dual-Band Negative Index Metamaterial: Double-Negative at 813 nm and Single-Negative at 772 nm

2006-12-28

arxiv.org/abs/physics/0612247v1

Physics

Optics

3 pages, 4 figures

Scientific paper

10.1364/OL.32.001671

This work is concerned with the experimental demonstration of a dual-band negative index metamaterial. The sample is double-negative (showing both a negative effective permeability and a negative effective permittivity) for wavelengths between 799 and 818 nm of linearly polarized light with a real part of refractive index of about -1.0 at 813 nm; the ratio -Re(n)/Im(n) is close to 1.3 at that wavelength. For an orthogonal polarization, the same sample also exhibits a negative refractive index in the visible (at 772 nm). The spectroscopic measurements of the material are in good agreement with the results obtained from a finite element electromagnetic solver for the actual geometry of the fabricated sample at both polarizations.

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