Fig. 6

Self-powered photonics applications. a Demonstration of self-powered optical tagging and tracking. I: Image of a remote-controlled bird model. Inset shows the enlargement of the attached elastomer film. II–IV: UVC ML images of wing flap under dark, indoor-lighting and outdoor sunlight conditions (distance: 3 m). V: In-flight demonstration of UVC ML as a visible signaling source. b Demonstration of self-powered microbial sterilization. I–II: Schematic illustrations of the sterilization process. III: Inactivation of Escherichia coli by UVC ML after various stretching cycles