Single-Step Fabricable Flexible Metadisplays for Sensitive Chemical/Biomedical Packaging Security and Beyond

• Published in: ACS applied materials & interfaces Vol. 14; no. 27; pp. 31194 - 31202
• Main Authors: Naveed, Muhammad Ashar, Kim, Joohoon, Ansari, Muhammad Afnan, Kim, Inki, Massoud, Yehia, Kim, Jaekyung, Oh, Dong Kyo, Badloe, Trevon, Lee, Jihae, Kim, Yeseul, Jeon, Dongmin, Choi, Jonghyun, Zubair, Muhammad, Mehmood, Muhammad Qasim, Rho, Junsuk
• Format: Journal Article
• Language: English
• Published: American Chemical Society 13.07.2022
• Subjects: anisotropy; environmental protection; Functional Nanostructured Materials (including low-D carbon); geometry; public health; transportation; packaging security; flexible metaoptics; nanoimprint lithography; polarization insensitive; flexible metasurface
• ISSN: 1944-8244; 1944-8252; 1944-8252
• DOI: 10.1021/acsami.2c09628

Secure packaging and transportation of light-sensitive chemical and biomedical test tubes are crucial for environmental protection and public health. Benefiting from the compact form factor and high efficiency of optical metasurfaces, we propose a broad-band polarization-insensitive flexible metasurface for the security of sensitive packages in the transport industry. We employ both the propagation and the geometric phase of novel TiO2 resin-based anisotropic nanoresonators to demonstrate a flexible and broad-band polarization-insensitive metasurface in the visible domain. The ultraviolet nanoimprint lithographic technique (UV-NIL) is used to fabricate high-index TiO2 nanoparticle-embedded-resin (nano-PER) structures that are patterned on a flexible substrate. This novel approach provides swift single-step fabrication without secondary fabrication steps such as deposition and etching. Moreover, replicating and transforming patterns over flexible substrates make the proposed technique highly suitable for large-throughput commercial manufacturing. As the proposed metahologram manifests high transmission efficiency in the visible domain, such flexible metaholographic platforms could find several exciting applications in bendable/curved displays, wearable devices, and holographic labeling for interactive displays.