Optical microcavities play an important role for the next-generation light technology. Recently, we succeeded in fabricating spherical microcavities from conjugated polymers (CPs) by simple self-assembly process and found that the microcavities show whispering gallery mode (WGM) resonant photoemission [1-4]. The CP-based microcavities are superior to conventional microcavities in points of simple fabrication process, function as both cavity and emitter, high photo-stability and optical gain, and potent use for electrically-driven WGM and lasers. In this presentation, we demonstrate the WGM-mediated intersphere light propagation and cascade-like energy conversion, in which the confined modes realize directional light energy transport between adjacent spheres and subsequent color conversion.

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