Figure 6
From: Engineered disorder and light propagation in a planar photonic glass
Direct visualization of in-plane light transport in ordered and disordered colloidal monolayers.
(a–c) Images of the cross-polarized backscattered light intensity from the ordered monolayer (ML) and from two different points of the most disordered binary monolayer (MB3) sample, respectively The excitation wavelength was 1200 nm and the beam was focused on a single sphere in the center of the image using the objective of NA = 0.9. (d) The decay of the backscattered light intensity with increasing distance from the excitation spot in the ordered monolayer (ML) sample, extracted from panel (a) along a crystal axis (red, solid line, taken along the 60o direction) and beside any crystal axis (dashed blue line) taken along the 90o direction). (e) The azimuth-averaged decay of captured light in the ML (red, thin line) and MB3 (black, thick line) samples. (f,g) Fourier plane images of the light scattered by ordered (ML) and disordered (MB3) samples in co-polarized light, respectively, obtained at the same points as scattered light patterns in panels (a,b). The red hexagon in panel (f) shows the Brillouin zone of the hexagonal lattice.
