非晶硫族化合物中的光诱导质量输运:表面等离子体辅助纳米光刻和近场纳米成像
Light-induced mass transport in amorphous chalcogenides: Towards surface plasmon-assisted nanolithography and near-field nanoimaging
摘要:
两种类型的非晶功能材料,基于光敏无机化合物,如硒和As20Se80硫族玻璃(ChG)进行了研究,目的是建立等离子体场的影响,由这些化合物和金纳米粒子的纳米复合材料层的带隙光激发,对它们的光机械响应。这两种基本材料的特征在于显著的光塑性效应,并且由于高的光致流动性和偏振相关的质量传输而用于光电元件(主要基于表面浮雕光栅)的实时光学记录。我们建立了质量传输过程中,这些ChG可以增强光产生的局部等离子体场的存在下,如果满足表面等离子体共振(SPR)的条件。特别感兴趣的主题是质量输运过程中的纳米复合材料层的均匀或周期性分布的光场刺激在纳米尺度。结果表明,表面等离子体共振光照射确实提高了质量传输效率,并产生了表面纳米结构。地形的变化密切地和永久地遵循下面的近场强度模式。
英文摘要:
Two types of amorphous functional materials, based on lightsensitive inorganic compounds like Se and As20Se80 chalcogenide 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 optoelectronic elements (based mainly on surface relief gratings) due to high photofluidity and polarization-dependent masstransport. We established that mass-transport processes in these ChG can be enhanced in the presence of localized plasmonic fields generated by light if the condition of surface plasmon resonance (SPR) is fulfilled. The subjects of special interest are the mass-transport processes at the nano-scale stimulated in the nano-copmosite layers of either by the uniform or periodically distributed optical fields. It was found that irradiation by light with SPR really enhance the efficiency of masstransport and produce surface nanostructurizations. The variation in the topography follows closely and permanently the underlying near field intensity pattern.
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