This research develops cavity-based methods for controlling thermal radiation by transforming random heat emission into coherent, directional thermal beams. Unlike traditional narrowband approaches, the technique enables broadband heat control using practical materials such as silicon and germanium, with potential applications in energy efficiency, waste-heat recycling, cooling technologies, and climate mitigation.

This research explores thermoelectric materials that can convert wasted heat into electricity, offering a promising tool against climate change. Inspired by digital thermometers, the work focuses on improving efficiency, stability, safety, and scalability of these materials. The long-term goal is to make energy recycling practical, alongside reducing and reusing energy.