Recent development in levitated optomechanics has presented new detection platforms for a diverse range of dark matter candidates. We discuss our recent application of using a nanogram-scale silica microparticle optically trapped in high vacuum to search for impulse signals induced by passing composite dark matter. The search is enabled by the achieved ~ 100 MeV/c momentum sensitivity of the system and the ability to stably trap and cool down micron-size particles. We also discuss our recent progress in constructing an array of levitated sensors and searching in the new parameter space with levitated nanoparticles.
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