A Piezoelectric Hyperbolic Metamaterial for Manipulating Light–Matter Interaction

ABSTRACT Hyperbolic metamaterials (HMMs) have emerged as a distinctive class of plasmonic materials owing to their exceptionally high photonic density of states (PDOS) and the ability to manipulate light–matter interactions over a broad spectral range. However, their optical properties are typically fixed once fabricated, which limits their adaptability in practical applications. In this study, we theoretically and experimentally demonstrate a mechanically tunable HMM by integrating a piezoelectric polymer, poly(vinylidene fluoride‐trifluoroethylene) [P(VDF‐TrFE)], as the dielectric component in a multilayered structure. The coupling between volume plasmon polaritons (VPPs) and piezoelectric deformation enables dynamic modulation of the hyperbolic dispersion and the corresponding optical responses. Furthermore, quantum dots (QDs) are incorporated into the structure, functioning both as probes of the altered photonic environment and as active gain media for random lasing emission. The proposed piezoelectric‐driven HMM provides an additional dimension for tunable plasmonic systems, offering new opportunities for adaptive photonic devices and advanced light‐control applications.