Driven by the demand for versatile and switchable high-speed optical devices, porous silicon as photonic crystals (PhC) have attracted significant interest in the recent past. As a little explored approach to create a complete dynamic photonic band gap, we recently reported the local consecutive infiltration of single pores in 2D PhC with different fluorescent and nonlinear optical (NLO) chromophores. While the linear optical properties of such hybrid materials have received considerable attention, their NLO responses are far less well understood. In contrast to isotropic materials or bulk optical properties, these materials require a detailed understanding of the crystallization inside the pores, in particular with respect of the possible formation of oriented textures. This contribution summarizes our efforts to study the crystallization and the emission behavior of two prototypical fluorescent dyes inside silicon-based 2D PhCs.
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