Realizing a flexible and wavelength-tunable random laser inspired by cicada wings

A bio-tissue-inspired random laser (RL) was successfully demonstrated with a dye-covered silk fibroin replica film (DC-SFRF), created using soft lithography from a cicada's wing. By applying mechanical stress to modify the nanopapillate structure distribution on the film's surface, the DC-SFRF RL exhibits a 13.3 nm blue shift and a decreased speckle contrast.