Figure 2. Optical images and light transmissivities of representative CT-MM films and square mesh.

(a) Photograph of a fabricated large-area CT-MM film sample (200 ×  200 mm²). Inset: optical morphology image showing the metallic networks patterned on the substrate. (b) A typical square mesh sample (φ 100 mm) with magnified pattern geometry. The relative optical transmittance of CT-MM and square mesh films as a function of wavelength measured in the ranges of (c) 300–800 nm and (d) 1.5–4 μ m. Light transmissivity at λ  =  633 nm as a function of coated CE thickness.