Figure 1.

(a) SEM image of silver nanorods. The 0° and 90° polarization orientations correspond to the nanorod long and short axes, respectively. (b) Extinction spectra of silver nanorods in air. The width is 90 nm and the lengths vary from 90 to 180 nm. (c) Absorbance spectrum of a 60 nm thick active layer before (SPY) and after (MC) the photochromic transition. (d) Variations of the refractive index real and imaginary parts of the organic layer due to the photochromic transition, measured by ellipsometry.