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Abstract
The expression of the quality factor of a spherical cavity filled with a homogeneous lossless chiral medium is rigorously derived for the first time. The loss on the metallic surface of the cavity is investigated. The quality factor for the lowest-order resonant mode is examined with the variation of the chirality. It is found that the quality factor is always greater than that of the non-chiral cavity. It is further observed that for a certain range of chirality values, the quality factor increases very fast. These findings have an implication for the application of chiral materials.