Journal Article Fabry-Pérot cavities Research Support, Non-U.S. Gov't carbon nanotubes conductive polymers dynamic tuning elastomers electrochemical transistors electro‐optic fullerene implantable probes laser patterning liquid crystalline networks lithium niobate metal-insulator-metal resonators metasurfaces nanophotonics photodetectors polymer processing stimuli-responsive polymers transistors tunable optical cavities