title: Stable gray soliton pinned by a defect in a microcavity-polariton condensate.
abstract: We study the spatially localized dark state, called dark soliton, in a one-dimensional system of the non-resonantly pumped microcavity-polariton condensate (MPC). From the recent work by Xue and Matuszewski [Phys. Rev. Lett. 112, 216401 (2014)], we know that the dark soliton in the pure MPC system is unstable. But we find that a dark soliton pinned by a defect in the impure MPC becomes a gray soliton and can be stabilized by the presence of a defect. Moreover, the stable regime of the gray soliton is given in terms of the defect strength and pump parameter.
authors.forename: Ting-Wei
authors.initials: TW
authors.lastname: Chen
authors.forename: Wen-Feng
authors.initials: WF
authors.lastname: Hsieh
authors.forename: Szu-Cheng
authors.initials: SC
authors.lastname: Cheng