Red, green and blue single-mode lasing in heterogeneously coupled system

(Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, Chinese Academy) Tunable microlasers that span the full visible spectrum, particularly red, green and blue (RGB)colors, are of crucial importance for various optical devices. Towards this goal, scientist in China proposed a heterogeneously coupled structure composed of three spherical microcavities. With each resonator serving as lasing source and filter simultaneously, tunable red, green and blue lasing was dem...