Figure 2 | Light: Science & Applications

Figure 2

From: Ellipsometric determination of permittivity in a negative index photonic crystal metamaterial

Figure 2

Ellipsometric measurements: blue tone lines define ψ spectra, and red tone lines define Δ spectra. The peak in ψ and the 180° jump in the Δ spectrum appear at λ0=1.55 µm for all θ angles. Inset: measurement geometry: ϕ is the angle between the incident wave vector and the normal to the surface in the incident plane; θ is the angle between the incident plane and the Γ–K symmetry direction (red arrow) in the PhC plane. PhC, photonic crystal.

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