Nano-sized electrostatic self-assembly (ESSA) multilayer ultrathin films, due to their unique structures, usually exhibit better nonlinear optical (NLO) properties than that of bulk materials.

• 纳米尺度的静电自组装多层超薄膜,由于其独特的结构特征,往往表现出优于体材料的非线性光学性质。