Probing the minimal supersymmetric standard model Higgs sector with explicitCPviolation at a photon linear collider

The $\mathrm{CP}$ properties of Higgs bosons can be probed through their s-channel resonance productions via photon-photon collisions by use of circularly and/or linearly polarized backscattered laser photons at a TeV-scale linear $e^{+}{e}^{-}$ collider. Exploiting this powerful tool, we investigate in detail the Higgs sector of the minimal supersymmetric standard model with explicit $\mathrm{CP}$ violation.