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Article Dans Une Revue Optics Express Année : 2008

Generation and control of hot spots on commensurate metallic gratings

Résumé

We study the light localization on commensurate arrangements of deep metallic sub-wavelength grooves. We theoretically show that as the degree of commensuration tends to an irrational number new light localization states are produced. These have properties close to that reported for hot spots on disordered surfaces and are not permitted for simple period gratings. Existence of these new resonances is experimentally provided in the infra-red region by reflectivity measurements performed on two commensurate samples with respectively two and three slits per period. Manipulations of these hot spots which can be controlled from far-field could be used for high sensitivity spectroscopy applications
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hal-00903565 , version 1 (04-04-2016)

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Aude Barbara, Jérôme Le Perchec, Stéphane Collin, Christophe Sauvan, Jean-Luc Pelouard, et al.. Generation and control of hot spots on commensurate metallic gratings. Optics Express, 2008, 16 (23), pp.19127-19135. ⟨10.1364/OE.16.019127⟩. ⟨hal-00903565⟩
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