Metal-to-insulator phase transition of molybdenum oxide for reversible writing and erasing information encryption
Year: 2024
Type: article
Abstract: Recent research on structural color manipulation is focusing on integrating phase change material (PCM) in plasmonic structures. Commonly reported PCM integrated plasmonic structures can only achieve information manipulation by switching images between different colors. In this paper, we have reported a theoretical design of reversibly switching colored information between visible and invisible simply using a MoOx based two layered structure. In our design, the MoOx layer can be switched between two phases, i.e., metallic MoO2 and insulating MoO3. The phase transition of MoOx possesses very complicated processes, which makes it advantageous for information encryption. Generally, in the proposed structure with metallic MoO2, various colors can be generated due to the F-P enhanced absorption at wavelengths where construction interference occurs. However, owing to the low loss of insulating MoO3 in visible region, the absorption is low though out the whole visible region. Thus all colors can be erased to white. Therefore, the colored information can be written and erased with our proposed structure by switching MoOx between metallic MoO2 and insulating MoO3. Utilizing the designed structure, we presented two kinds of devices possessing the functions of image ‘writing and erasing’ to verify the possibility of application in information encryption. The proposed image encryption device can be acquired easily by masking and coating processes. We believe our results provides a new way in designing encryption devices.
Source: Physica Scripta
Authors: Jianxing Zhao, Yao Zhou, Gong Zhang, Jianhong Zhou
Institution: Changchun University of Science and Technology
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Award: G6078556024
OpenAlex ID: W4403755732