| Summary: | 碩士 === 國立臺灣師範大學 === 光電科技研究所 === 105 === We have demonstrated a random laser that can be brought above and below the threshold for different lasing emissions by simple changes in the curvature of flexible PI substrate underneath, and that creates a lasing emission with curvature-controllable optical spectra. In this study, the ZnO nanorods synthesized by the hydrothermal method was randomly distributed on the flexible PI substrate to serve as optical scattering centers, and the gain material of rhodamin 6G (R6G) was then spin-coated to cover the entire ZnO nanorods. Consequently, by bending different curvatures on the flexible PI substrate to select an appropriate mean-free-path (MFP) for the emitted photons interacting with the ZnO nanorods, the tunable random laser can be designed and shows different spectral behaviors. This laser may find specific applications, for example a remote sensor to monitor the deformation of pipes within the buildings, and explore the functionality of disorder based photonic devices.
|
|---|
