Researchers in Japan made a four-micrometer sphere of chiral polymer that lases in a flat ring, like Saturn. The molecules self-assembled into a surface swirl that gives the light a direction. A clear look at the first angle-selective lasing from a sphere, driven by its own surface chemistry.
Kyoto University's Takuji Hatakeyama and colleagues linked multiple-resonance units to reach a 5.5nm emission band in solution, pushing spontaneous emission toward laser-like color purity. Published in Science, it points to purer, more efficient next-gen displays.
