2009/09/17 by Jonathan Andreasen, Hui Cao
Physics and Astronomy · #Photonic Crystals and Applications #Quantum optics and atomic interactions #Random lasers and scattering media #physics.optics
paper · pdf · doi:10.1364/ol.34.003586
published as Opt. Lett., 34 (2009) 3586-3588 · 9 pages, 3 figures
arxiv created 2009/09/17 · openalex publication_date 2009/11/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report on the creation of new lasing modes with spatially nonuniform profiles of optical gain in a one-dimensional random structure. It is demonstrated numerically that even without gain saturation and mode competition, the spatial nonuniformity of gain can cause dramatic and complicated changes. New lasing modes appear with frequencies between those of the lasing modes with uniform gain. We examine new modes in detail and find that they exhibit high output directionality. Our results show that random lasing properties may be modified significantly without changing the underlying structure.