Mode Controllability of a Network Random Laser

Nanophotonic networks, micrometer-scale systems made of interconnected sub-wavelength waveguides, have important applications in quantum optics and integrated photonics. Random lasing is often uncontrolled in emission wavelength, directions and temporal dynamics. The complexity of the photonic network lasers allows the formation of spatially localized E.M. modes and brings the opportunity to control the lasing action by selectively illuminating a small subset of the network links. This result is predicted by a graph description of Maxwell’s equations, which is used to model the network laser. A computational procedure that can be experimentally implemented to select a single mode is developed and its results studied. The experimental mode selection procedure is tested on a sample using adaptive pumping, achieving mode controlling.