Figure 6: Wavelength-dependent optical anisotropy in nanocomposite thin films.
From: Rapid fabrication of hierarchically structured supramolecular nanocomposite thin films in one minute
(a) Schematics of the ellipsometry measurements of the in-plane (no+iko) and out-of-plane (ne+ike) components of the complex refractive indices. (b) Real refractive index, no, of different films as a function of wavelength. Ordered nanocomposite thin film shows a pronounced peak near λ=544 nm (highlighted in grey) because of the strong interaction between the incident electromagnetic wave and the collective plasmonic coupling of the ordered nanoparticle chains parallel to the surface. This leads to a wavelength-dependent optical birefringence of the film (Δn∼−0.087 at 544 nm) for light manipulation applications as shown in c and a wavelength dependence of the reflectivity ratio and the phase difference shown in d and e, respectively.
