摘要： The self-assembly of oppositely charged colloidal ellipsoids and spheres under the active con?nement is ?rstly proposed to achieve long-range ordered photonic crystals. Compared with the conventional passive con?nement, a characteristic of the active con?nement is that boundaries are movable. Our Brownian dynamics simulations show that dynamic steady structures, similar to quasi-2D colloidal crystals, can be obtained under the strong con?nement when the two boundaries periodically oscillate together. The in-plane structures can be regulated by changing the charge ratio of the two kinds of particles. These dynamic steady structures are determined by the minimum electrostatic energy with the aid of increased mobility of con?ned particles, which are not available in equilibrium. Numerical simulations verify that light can be perfectly con?ned in this dielectric binary photonic slab without any radiation, which corresponds to a typical optical bound state with divergent lifetime and ultrasharp spectral pro?le. Given the changeable geometry of this photonic slab, the trapped optical ?eld might be applicable to enhanced light-matter interactions. In addition, for thicker layers, layer-by-layer ordered structures occur spontaneously driven by the active con?nement, while no global order in the passive con?nement. Our results show that the boundary motion can become an important factor a?ecting self-assembled structure and function.