A veneer stack that can change its emissivity, its appearance, or its radio-frequency behaviour on command. The design goal across this work is not invisibility — it is being uninteresting to a sensor that is already looking at you.
Layered nanopatterned veneers carrying active films — vanadium dioxide, phase-change chalcogenides, electrochromics, electrowetting elements — written by femtosecond inscription or lithography and protected by conformal ceramic claddings. Tile-local controllers hold safe defaults and keep an auditable log of every actuation, on the principle that a surface which can change how it looks is a surface that needs a record of why it did.
A phase-controllable emitter paired with an electrowetting black-fill channel, so a pixel can be both bright and genuinely black rather than grey. Subwavelength holographic emitters are built in veneer stacks over a ceramic thermal backplate, which is what keeps the optical stack dimensionally stable as it heats.
Three implementations against three different power budgets: polymer-dispersed liquid crystal switched by voltage, vanadium dioxide switched thermally, and a germanium-antimony-tellurium phase change set by femtosecond laser that then holds its state at zero power. The last is the interesting one for anything that has to stay in a configuration without drawing current to do it.
A zoned microfluidic insert that drives absorbing dye across a canopy layer, taking it from clear to black in under a second. It fails safe to transparent, which is the only defensible failure mode for something sitting between a pilot and the sky. Pairs with a coherent-phase projector to produce a deterministic low-luminance background.
A dermal-scale system coupling a thermochromic metasurface, statistical visual texture, a radio-frequency backplane and electrowetting actuators under sensor fusion, managing a signature across sensing modalities at once. The reasoning is straightforward: defeating one sensor while lighting up another is worse than doing nothing.
Thin veneers and pin-field microtextures that concentrate thermal and electromagnetic fields into chosen bands, improving radiative shedding while keeping emissivity stable as the surface wears. This is where the photonics work and the thermal work meet — the same texturing that raises emissivity for a heat shield is what tunes a signature here.