title: Coherent perfect absorption in chiral metamaterials.
abstract: We study the coherent perfect absorption (CPA) of a chiral structure and derive analytically the CPA condition for transversely isotropic chiral structures in circular polarization bases. The coherent absorption of such a chiral system is generally polarization dependent and can be tuned by the relative phase between the coherent input beams. To demonstrate our theoretical predictions, a chiral metamaterial absorber operating in the terahertz frequency range is optimized. We numerically demonstrate that a coherent absorption of 99.5% can be achieved. Moreover, we show that an optimized CPA chiral structure can be used as an interferometric control of polarization state of the output beams with constant output intensity.
authors.forename: Yuqian
authors.initials: Y
authors.lastname: Ye
authors.forename: Darrick
authors.initials: D
authors.lastname: Hay
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Shi