Ultrahigh‐Water‐Content Photonic Hydrogels with Large Electro‐Optic Responses in Visible to Near‐Infrared Region

The embedding of photonic crystals within stimuli‐responsive hydrogels has attracted tremendous interest because it provides new applications such as optical switches, displays, and sensors. However, the production of electrically tunable photonic hydrogels with a wide range of color tunability, fast electrical response, and high stability for repeated use is still challenging. Here, electrically tunable photonic hydrogels are fabricated using...