What is it about?
Color changing surfaces are important for visible displays and camouflage applications. We have shown dynamic and reversible color switching with temperature using uniform ultrathin vanadium dioxide films on Aluminium. The structure does not need any lithographic patterning and uses low cost metals only. Wide color gamut is covered using this simple structure.
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Why is it important?
Standalone VO2 suffers from low optical switching in the visible region. In this work, we address this limitation and achieve enhanced optical switching using a simple, unpatterned, ultrathin structure of VO2 on Al. Existing studies report solutions such as multilayering, intricate structural patterning, high thermal budget processes, and costly metals for improved color switching, thereby adding to the process cost and complexity. In contrast, this work shows a significant change in chromaticities and covers a large color gamut using only low cost materials and without the need for any lithographic patterning.
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This page is a summary of: Dynamic multi-color switching using ultrathin vanadium oxide on aluminum-based asymmetric Fabry–Pérot resonant structure, Applied Physics Letters, January 2024, American Institute of Physics,
DOI: 10.1063/5.0175803.
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