Piezoelectrically controllable wavelength tuning of a photonic crystal nano-light emitter in a polymer thin film

In this study, we developed 1D photonic crystal (PhC) nano-light emitters embedded in a polydimethylsiloxane thin film approximately 15 $\upmu $m thick. By attaching this film to a piezoelectric substrate of polyvinylidene fluoride (PVDF), we achieved a reversible emission wavelength shift of 1.4 nm in response to bending induced by the PVDF substrate, with an applied voltage of 80 V. Additionally, we demonstrated a significant wavelength tuning range exceeding 22 nm and stable tuning across various voltage levels. This work presents what we believe is a novel laminated configuration for mechanically tuning the wavelength of PhC nano-light emitters, highlighting its potential applications in flexible photonics.