Enhanced absorption of light by charged nanoparticles.
Enhanced absorption of light by charged nanoparticles.
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DOI：
10.1364/ol.35.001178
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发表时间：
2010-04
期刊：
影响因子：
3.6
通讯作者：
E. Rosenkrantz;S. Arnon
中科院分区：
文献类型：
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作者：
E. Rosenkrantz;S. Arnon
我们发现，在给定的一组参数下，与等效的非带电粒子相比，各种带电纳米粒子（NPs）可以在共振期间提高电磁（EM）辐射衰减的效率超过30倍。从数学上推导了入射电磁辐射与NP表面激发之间存在共振状态的条件。我们的结果揭示了这种带电NPs强吸收光的机制。这项研究的结果可能有助于设计新一代的通信设备以及生物细胞成像的新技术。
We found that various charged nanoparticles (NPs) can raise the attenuation of electromagnetic (EM) radiation over 30 times more efficiently during resonance in comparison to equivalent noncharged particles for a given set of parameters. A condition that indicates a state of resonance between the incident EM radiation and the NP surface excitations is mathematically derived. Our results shed light on the mechanism responsible for the strong absorption of light by such charged NPs. The outcome of this research could help to design a new generation of communication devices as well as a new technique for biological cell imaging.