Strong optical confinement implemented with 2D photonic-crystal (PhC) microcavities provides a powerful tool for controlling the features of light-matter interaction. Combined with nanostructures such as quantum wells, quantum wires (QVTRs) or quantum dots, the PhC cavities - efficiently controlling spontaneous emission [1] are envisaged to bring superior semiconductor-laser performance [2], which could be exploited for applications in low-power-consumption integrated optoelectronics. Furthermore, inter-cavity optical coupling may allow for optimizing the laser output power [3] and realizing ultra-fast switching devices [4].