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Show simple item record Sroor, H Naidoo, Darryl Miller, SW Nelson, J Courtial, J Forbes, A 2019-02-07T07:27:53Z 2019-02-07T07:27:53Z 2019-01
dc.identifier.citation Sroor, H. et al. 2019. Fractal light from lasers. Physical Review A, vol. 99(1): DOI: 10.1103/PhysRevA.99.013848 en_US
dc.identifier.issn 2469-9926
dc.identifier.issn 2469-9934
dc.identifier.uri DOI: 10.1103/PhysRevA.99.013848
dc.description Article published in Physical Review A: DOI: 10.1103/PhysRevA.99.013848 en_US
dc.description.abstract Fractals, complex shapes with structure at multiple scales, have long been observed in Nature: as symmetric fractals in plants and sea shells, and as statistical fractals in clouds, mountains and coastlines. With their highly polished spherical mirrors, laser resonators are almost the precise opposite of Nature, and so it came as a surprise when, in 1998, transverse intensity cross-sections of the eigenmodes of unstable canonical resonators were predicted to be fractals [Karman et al., Nature 402, 138 (1999)]. Experimental verification has so far remained elusive. Here we observe a variety of fractal shapes in transverse intensity cross-sections through the lowest-loss eigenmodes of unstable canonical laser resonators, thereby demonstrating the controlled generation of fractal light inside a laser cavity. We also advance the existing theory of fractal laser modes, first by predicting 3D self-similar fractal structure around the centre of the magnified self-conjugate plane, second by showing, quantitatively, that intensity cross-sections are most self-similar in the magnified self-conjugate plane. Our work offers a significant advance in the understanding of a fundamental symmetry of Nature as found in lasers. en_US
dc.language.iso en en_US
dc.publisher American Physical Society en_US
dc.relation.ispartofseries Worklist;21975
dc.subject 3D fractals en_US
dc.subject Fractal light en_US
dc.subject Laser en_US
dc.subject Transverse fractals en_US
dc.title Fractal light from lasers en_US
dc.type Article en_US

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