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Tunable degree of localization in random lasers with controlled interaction (Articolo in rivista)

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Tunable degree of localization in random lasers with controlled interaction (Articolo in rivista) (literal)

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Alternative label

Marco Leonetti(1,2); Claudio Conti (3,1); Cefe López (2) (2012)
Tunable degree of localization in random lasers with controlled interaction
in Applied physics letters; AIP, American institute of physics, Melville, NY (Stati Uniti d'America)
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1 ISC-CNR, UOS Sapienza, P. A. Moro 2, 00185 Roma, Italy 2 Instituto de Ciencia de Materiales de Madrid (CSIC), Cantoblanco 28049 Madrid, Spain 3 Department of Physics University Sapienza, P.le Aldo Moro 5, I-00185 Roma, Italy (literal)

Titolo

Tunable degree of localization in random lasers with controlled interaction (literal)

Abstract

We show that the degree of localization for the modes of a random laser (RL) is affected by the inter mode interaction that is controlled by shaping the spot of the pump laser. By experimentally investigating the spatial properties of the lasing emission we infer that strongly localized modes are activated in the low interacting regime while in the strongly interacting one extended modes are found lasing. Thus we demonstrate that the degree o localization may be finely tuned at the micrometer level. (literal)

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