Fig. 1: Materials applied to the dual-layer optical encryption fluorescent polymer waveguide chip.

a Molecular structures of TCBzC and TCNzC, with the clarified TCBzC/SU-8 and TCNzC/SU-8 solutions; b the molecular structure of SU-8 core layer and the synthesis process for P(MMA-co-GMA); c the refractive index (n) and extinction coefficient (k) characterization of TCBzC/SU-8 and TCNzC/SU-8 optical waveguide materials.