Radioplasmonics：设计空气和吸收介质中的等离子体毫微粒，用于天线通信和人体体内应用
Radioplasmonics: design of plasmonic milli-particles in air and absorbing media for antenna communication and human-body in-vivo applications
摘要：
使用超材料制成的毫米粒子，在射频范围内表现得像金属，预测具有MHz-GHz能量的表面等离子体。在这项工作中，利用所谓的Radioplasmonics设计嵌入在不同的现实介质中的散射体，具有可调的吸收或散射特性。高品质的散射/吸收等离子体激元激发的基础上，通过几个简单的例子证明，有用的构建比传统的性能更好的天线。嵌入吸收介质（如盐溶液或生物组织）中的系统也被认为可以改善生物医学应用，并有助于在身体组织中提供实时体内监测工具。在这方面，任何可能的实施方式都是通过用全热模拟计算射频加热来批评的。作为放射性等离子体系统提供的多功能性的证明，等离子体“杂交”用于将近场增强到前所未有的值或调谐光谱中的共振，从而最小化加热效应。最后，一个可监测的药物输送在人体组织中的说明与一个假设的例子。这项研究具有显着的后果等离子体的概念在宏观尺度上。在Radioplasmonics中，由于考虑了具有基本几何形状的块状材料，因此简化了最近发展的通过复杂结构实现的“欺骗”等离子体激元的概念。
英文摘要：
Surface plasmons with MHz-GHz energies are predicted by using milliparticles made of metamaterials that behave like metals in the radiofrequency range. In this work, the so-called Radioplasmonics is exploited to design scatterers embedded in different realistic media with tunable absorption or scattering properties. High-quality scattering/absorption based on plasmon excitation is demonstrated through a few simple examples, useful to build antennas with better performance than conventional ones. Systems embedded in absorbing media as saline solutions or biological tissues are also considered to improve biomedical applications and contribute with real-time, in-vivo monitoring tools in body tissues. In this regard, any possible implementation is criticized by calculating the radiofrequency heating with full thermal simulations. As proof of the versatility offered by radioplasmonic systems, plasmon "hybridization" is used to enhance near-fields to unprecedented values or to tune resonances as in optical spectra, minimizing the heating effects. Finally, a monitorable drug-delivery in human tissue is illustrated with a hypothetical example. This study has remarkable consequences on the conception of plasmonics at macroscales. The recently-developed concept of "spoof" plasmons achieved by complicated structures is simplified in Radioplasmonics since bulk materials with elemental geometries are considered.
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