Fig. 10
From: Plasmonic- and dielectric-based structural coloring: from fundamentals to practical applications
a Schematic of mechanically-deformed photonic crystal slap. Inset: Illustration of deformation process [36]. b HCM designs and magnified HCM unit cells, and photo of fabricated sample with flower pattern. The scale bar 1 cm. (Bottom) images of color-changing flower as a function of stretching ε = ΔL∕L [37]. c Embedded TiO2 nanorod in PDMS. d Illustration of fabrication process. e (Top) y-polarized and x-polarized dipole orientation with respect to strain direction. (Bottom) y-polarized and x-polarized transmission spectra with respect to increasing strain. Black arrow: direction of resonance wavelength shifts [38]