2001/01/01 by Thomas Hisch, Matthias Liertzer, Dionyz Pogany +4 · 1 citation
Engineering · Physics and Astronomy · Social Sciences · #Advanced Optical Imaging Technologies #Art #Computational physics #Digitalization, Law, and Regulation #Humanities #Laser #Lasing threshold #Optics #Orbital Angular Momentum in Optics #Physics #Political science #Random laser #Random lasers and scattering media #Scattering #physics.optics
paper · pdf · doi:10.1103/physrevlett.111.023902
published as Phys. Rev. Lett. 111, 023902 (2013) · 5 pages, 4 figures plus 5 pages supplemental material
openalex publication_date 2001/01/01 · arxiv created 2013/07/31 · arxiv updated 2013/08/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/04/28
The angular emission pattern of a random laser is typically very irregular and difficult to tune. Here we show by detailed numerical calculations that one can overcome the lack of control over this emission pattern by actively shaping the spatial pump distribution. We demonstrate, in particular, how to obtain customized pump profiles to achieve highly directional emission. Going beyond the regime of strongly scattering media where localized modes with a given directionality can simply be selected by the pump, we present an optimization-based approach which shapes extended lasing modes in the weakly scattering regime according to any predetermined emission pattern.