Light-induced mass transport in amorphous chalcogenides: Towards surface plasmon-assisted nanolithography and near-field nanoimaging

Trunov, M. L. and Lytvyn, P. M. and Nagy, Péter Miklós and Csík, Attila and Rubish, V. M. and Kökényesi, Sándor Jenő (2014) Light-induced mass transport in amorphous chalcogenides: Towards surface plasmon-assisted nanolithography and near-field nanoimaging. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 251 (7). pp. 1354-1362. ISSN 0370-1972

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Abstract

Two types of amorphous functional materials, based on light- sensitive inorganic compounds like Se and As20Se80 chalco- genide glass (ChG) were investigated with the aim to establish the influence of plasmonic fields, excited by the band-gap light in nanocomposite layers made of these compounds and gold nanoparticles on their photomechanical response. Both these basic materials are characterized by pronounced photoplastic effect and used for real-time optical recording of optoelec- tronic elements (based mainly on surface relief gratings) due to high photofluidity and polarization-dependent mass- transport. We established that mass-transport processes in these ChG can be enhanced in the presence of localized plas- monic fields generated by light if the condition of surface plas- mon resonance (SPR) is fulfilled. The subjects of special in- terest are the mass-transport processes at the nano-scale stim- ulated in the nano-copmosite layers of either by the uniform or periodically distributed optical fields. It was found that irradi- ation by light with SPR really enhance the efficiency of mass- transport and produce surface nanostructurizations. The varia- tion in the topography follows closely and permanently the un- derlying near field intensity pattern.

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