Abstract
We study how the light transport behavior evolves when a one-dimensional (1-D) system changes continuously from a perfectly ordered structure to a highly disordered structure. The introduction of randomness to a periodic structure enhances light localization in frequency regions in which it is delocalized in a periodic structure. To better understand the phenomenon and further investigate how the cavity is formed, we conduct a systematic study of the impact of the material and geometric properties of a random medium on the performance of random lasers; in a completely random system, a resonant cavity is formed by two stacks of multiple layers which serve as two highly reflective broadband mirrors. We calculate the size and the quality factor of 1-D random cavities.
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