Abstract
We report on a selective modal oscillation dynamics of Random Lasing (RL) by using a simple two-dimensional RL model. This model consists of two terms; two-dimensional scattering model, and rate equations. Using this model, we show how lasing modes behave as a scattering state of photons inside the system changes. Calculation results indicate that closed loop shaped light path and strong feedback mechanisms produced by scatterers around the loop are necessary for RL's modal oscillation. Background scattering events efficiently support the modal oscillation on the closed loop path.
