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Non-locality and collective emission in disordered lasing resonators

Autor Leonetti, M. ; Conti, C.; López, Cefe
Palabras clave Random lasing
Collective emission
Fecha de publicación 2013
EditorNature Publishing Group
Citación Light: Science and Applications 2: e88 (2013)
ResumenRandom lasing is observed in optically active resonators in the presence of disorder. As the optical cavities involved are open, the modes are coupled, and energy may pour from one state to another provided that they are spatially overlapping. Although the electromagnetic modes are spatially localized, our system may be actively switched to a collective state, presenting a novel form of non-locality revealed by a high degree of spectral correlation between the light emissions collected at distant positions. In a nutshell, light may be stored in a disordered nonlinear structure in different fashions that strongly differ in their spatial properties. This effect is experimentally demonstrated and theoretically explained in titania clusters embedded in a dye, and it provides clear evidence of a transition to a multimodal collective emission involving the entire spatial extent of the disordered system. Our results can be used to develop a novel type of miniaturized, actively controlled all-optical chip. © 2013 CIOMP. All rights reserved.
Descripción This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs Works 3.0 Unported license.
Versión del editorhttp://dx.doi.org/10.1038/lsa.2013.44
URI http://hdl.handle.net/10261/95148
Identificadoresdoi: 10.1038/lsa.2013.44
e-issn: 2047-7538
issn: 2095-5545
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