Figure 6
From: An angle-compensating colorimetric strain sensor with wide working range and its fabrication method
(a) Optical images of 2D hexagonal photonic crystal structures at reflection mode shows the areas have different brightness, (b) Optical images of 2D hexagonal photonic crystal structures at transmission mode shows the presence of nanoparticles in region A and B, while region C is empty. (c–f) Optical images of 2D hexagonal photonic crystal structures for various angles (reflection mode) show the alternating brightness of region A and B, (g) Polar plot of brightness of region B with rotation angle, (h) High magnification image (transmission mode) shows the orientations of hexagonal lattices and incident light in region A and B (scale bar 5 µm).
