Peacock Feathers Emit Laser Beams, a First in Nature

A new study reveals that peacock feathers can emit laser light after being soaked with dye and excited by green pulses, showcasing a novel biological laser phenomenon that could advance imaging and sensing technologies. The laser action is due to internal microstructures acting as resonators, not traditional cavities, and highlights the complex photonic properties of feather nanostructures. This discovery opens new avenues for biological photonics and minimally invasive imaging tools.