Bidirectional Wavelength Tuning in Stretchable Chiral Liquid Crystal Elastomers using Multi-modal Soft Actuators
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The ability to fine-tune the wavelengths of structural colors using photonic elastomers made from soft materials is becoming significant for dynamic photonic applications. Achieving on-demand control over omnidirectional wavelength adjustments in both directions is highly desirable. However, most existing research has focused mainly on tuning wavelengths in one direction, typically towards shorter wavelengths. Here, we present a novel approach for comprehensive wavelength tuning in both shorter and longer directions. By utilizing areal expansion and compression deformation through multi-modal dielectric elastomer actuators (DEAs) in conjunction with chiral liquid crystal elastomers (CLCEs), we realize simultaneous and versatile structural color tuning. This breakthrough in bidirectional wavelength control expands the tuning range and versatility, opening up new possibilities for its application in advanced photonic technologies.