Phys.org  August 7, 2019 Existing photonic crystal cavities usually only confine one wavelength of light and their structures are highly customized to accommodate that one wavelength. To force the coexistence of the two laser beams using a photonic crystal cavity, an international team of researchers (USA -Stanford University, Italy) devised a structure that combines two different ways to confine light, one to hold onto the infrared light and another to hold the green, all still contained within one tiny crystal. After ironing out the details of their two-part structure, the researchers produced a list of four conditions, which should guide […]