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Non-locality and collective emission in disordered lasing resonators

Light(Science & Applications) 2013年第1期2卷 79-84页

作者： Marco Leonetti Claudio Conti cefe lopez ISC-CNR UOS Sapienza00185 RomaItaly Institute for Material Science Madrid(ICMM-CSIC) 28049 MadridSpain Department of Physics University SapienzaI-00185 RomaItaly

Random lasing is observed in optically active resonators in the presence of *** the optical cavities involved are open,the modes are coupled,and energy may pour from one state to another provided that they are spatially *** 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 *** a nutshell,light may be stored in a disordered nonlinear structure in different fashions that strongly differ in their spatial *** 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 *** results can be used to develop a novel type of miniaturized,actively controlled all-optical chip.

关键词： collective emission disorder nanophotonics random lasing

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Female mate choice based on pheromone content may inhibit reproductive isolation between distinct populations of Iberian wall lizards

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Current Zoology 2013年第2期59卷 210-220页

作者： Marianne GABIROT Pilar lopez Jose MARTIN Departement Ecologie Comportementale (U.M.R. 5175) CEFE-CNRS 1919 Route de Mende F34293 Montpellier Cedex 5 France Departamento de Ecologia Evolutiva Museo Naeional de Ciencias Naturales C.S.I.C. Jos6 Guti6rrez Abascal 2 28006 Madrid Spain

The Iberian wall lizard Podarcis hispanica forms part of a species complex with several morphologically and geneti- cally distinct types and populations, which may or may not be reproductively isolated. We analyzed whether female mate choice based on males＇ chemical signals may contribute to a current pre-mating reproductive isolation between two distinct populations of P. hispanica from central Spain. We experimentally examined whether females choose to establish territories on areas scent-marked by males of their own population, versus areas marked by males of the other population. Results showed that fe- males did not prefer scent-marks of males from their own population. In contrast, females seemed to attend mostly to among-individual variation in males＇ pheromones that did not differ between populations. Finally, to test for strong premating re- productive isolation, we staged intersexual encounters between males and females. The population of origin of males and females did not affect the probability nor the duration of copulations. We suggest that the different environmental conditions in each population might be selecting for different morphologies and different chemical signals of males that maximize efficiency of communication in each environment. However, females in both populations based mate choice on a similar condition-dependent signal of males. Thus, male signals and female mate choice criteria could be precluding premating reproductive isolation between these phenotypically ＂distinct＂ populations [Current Zoology 59 （2）： 210-220, 2013].

关键词： Podarcis hispanica Chemical communication Mate preferences Mate recognition Species recognition Conflict

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