Abstract
Reported here is a coherent (resonant) random laser fluid of nematic liquid crystal (LC) emulsions. It is a low-viscosity fluid like a usual liquid. The coherent laser is developed because of the high LC droplet density (about 32%) and the high refractive index of the LC. The optical loop forms among the LC droplets and its length is evaluated to be approximately 150 µm. The LC emulsion is useful for the investigation of the mechanism of the random laser because it is a fluid and can easily be used to change the scatterer density.
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