Cataloged from PDF version of article.We summarize the progress in the development and application of chiral metamaterials. After
a brief review of the salient features of chiral metamaterials, such as giant optical activity,
circular dichroism, and negative refractive index, the common method for the retrieval of
effective parameters for chiral metamaterials is surveyed. Then, we introduce some typical
chiral structures, e.g., chiral metamaterial consisting of split ring resonators, complementary
chiral metamaterial, and composite chiral metamaterial, on the basis of the studies of the
authors’ group. The coupling effect during the construction of bulk chiral metamaterials is
mentioned and discussed. We introduce the application of bianisotropic chiral structures in the
field of asymmetric transmission. Finally, we mention a few directions for future research on
chiral metamaterials
