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A strategy of efficient laser emission with resonant feedback based on a microemulsion comprising of a Blue-Phase Liquid Crystal (BPLC), laser dye and block copolymer is presented here. BPLCs are produced and confined in microspheres with a microfluidic apparatus. These spatially assembled dye doped BPLC microdroplets are used to generate laser light. The topologically directed assemblies of BPLC microspheres with specific shape and symmetry are essential for reducing threshold and increasing Q-factor of laser emission. These results provide new avenues for a wide range of photonic applications.
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