AI Article Synopsis
- Active optical metasurfaces use flexible materials to manipulate light in new ways, allowing for innovative human-technology interactions.
- Researchers developed soft metasurfaces that change shape through the swelling of conducting polymers, improving upon traditional methods that face trade-offs between tuning ability and optical loss.
- Using a specific polymer, PEDOT:PSS, they achieved dynamic color tuning and efficient beam steering while operating at low voltages, making these metasurfaces promising for wearable technology.
Article Abstract
Active optical metasurfaces, capable of dynamically manipulating light in ultrathin form factors, enable novel interfaces between humans and technology. In such interfaces, soft materials bring many advantages based on their flexibility, compliance and large stimulus-driven responses. Here, we create electrochemically mutable, soft metasurfaces that capitalize on the swelling of soft conducting polymers to alter the shape and associated resonant response of metasurface elements. Such geometric tuning overcomes the typical trade-off between achieving substantial tuning and low optical loss that is intrinsic to dynamic metasurfaces relying on index tuning of materials. Using the commercial polymer PEDOT:PSS, we demonstrate dynamic, high-resolution colour tuning and high-diffraction-efficiency (>19%) beam-steering devices that operate at CMOS-compatible voltages (~1.5 V). These results highlight how the deformability of soft materials can enable a class of high-performance metasurfaces that are suitable for body-worn technologies.
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| http://dx.doi.org/10.1038/s41563-024-02042-4 | DOI Listing |
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