| Abstract Scope |
We will present rationally designed synthesis of a self-assembled nanostructure using martensitic phase transformations.[1] We demonstrate synthesis of a self-assembled nanostructure on a strain-engineered perovskite SrSnO3 thin film having a "picnic blanket" pattern of two different crystallographic phases, where each phase has sharply different dielectric properties. This has resulted in a nanostructured metamaterial with effectively variable photonic crystal properties. Using chemical doping and strain engineering, these patterns can be designed to have different periodicities. Furthermore, by varying the environment temperature or by varying laser wavelength, the dielectric contrast within a single film can be tuned due to the responsive changes in the relative phase fractions associated with the martensitic phase transformation.
[1] A. Prakash, T. Wang, A. Bucsek, T. K. Truttmann, A. Fali, M. Cotrufo, H. Yun, J.-Woo Kim, P. J. Ryan, K. Andre Mkhoyan, A. Alù, Y. Abate, R. D. James, and B. Jalan, Nano Lett. 21 1246 (2021) |