Tunable optical materials can enable more functionality while maintaining flexibility in a single aperture, which is relevant to making visible and infrared image sensing more context aware. DARPA’s Accelerating discovery of Tunable Optical Materials (ATOM) program is exploring fundamental insights into the physics of tunable optical materials with the goal of developing new materials for optic and photonic applications. The specific characteristics of interest are a large change in refractive index (Δn) to delay light, low loss for high transmissivity (k), and fast switching speeds. Rare earth nickelates and phase change materials, integrated with machine learning to accelerate insights into new materials, show initial promise toward the ATOM program goals.
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