Schematic structure of two types of optical circuits: the three-particle ordered structure functions as a magnet on a nanometer scale, while the seven-particle molecule exhibits a concentration of light in a narrow range of wavelengths due to mutual interference. Image: Federico Capasso's lab, Harvard School of Engineering and Applied Sciences.

Schematic structure of two types of optical circuits: the three-particle ordered structure functions as a magnet on a nanometer scale, while the seven-particle molecule exhibits a concentration of light in a narrow range of wavelengths due to mutual interference. Image: Federico Capasso's lab, Harvard School of Engineering and Applied Sciences.