Gadolinium and Europium Doped Chiral Perovskite Films with Magnetic Circular Dichroism and Circularly Polarized Luminescence for Information Encryption Applications

and also displayed enhanced magnetic circular dichroism (MCD) responses. We further developed an optical encryption system based on multidimensional regulation of components/polarization/wavelength, enabling dynamic programmable information storage and providing a new material platform for spin photon devices, quantum communication, and high-end anti-counterfeiting technology.