Time-harmonic optical heating of plasmonic nanoparticles
Time-harmonic optical heating of plasmonic nanoparticles
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DOI：
10.1103/physrevb.90.035439
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发表时间：
2014-07-24
影响因子：
3.7
通讯作者：
Baffou, Guillaume
中科院分区：
文献类型：
--
作者：
Berto, Pascal;Mohamed, Mohamed S. A.;Baffou, Guillaume
在等离子体共振波长的照射下，金属纳米颗粒可以通过吸收光转变为高效的纳米热源。加热小体积可以实现快速动态。本文从理论上、数值上和实验上研究了由调制入射光产生的等离子体系统的温度分布。特别地，我们研究了温度变化在振幅和相位上的响应。单纳米粒子和多纳米粒子的情况都解决了。讨论了许多参数，如介质（纳米粒子和周围环境）的性质、纳米粒子或等离子体系统的大小、纳米粒子间距、调制频率、纳米粒子可能的有限表面热导率以及系统的维数。这项工作还旨在确定等离子体系统在其周围介质中诱导温度变化的速度有多快。
Under illumination at their plasmonic resonance wavelength, metal nanoparticles can turn into efficient nanosources of heat by light absorption. Heating a small volume makes it possible to achieve fast dynamics. In this paper, we investigate theoretically, numerically, and experimentally the temperature distribution of a plasmonic system generated by a modulated incoming light. In particular, we study the response in amplitude and phase of the temperature variations. The cases of single and multiple nanoparticles are both addressed. Many parameters are discussed such as the nature of the media (nanoparticle and surroundings), the size of the nanoparticle or of the plasmonic system, the nanoparticle interdistance, the frequency of the modulation, a possible finite surface thermal conductivity of the nanoparticles, and the dimensionality of the system. This work is also intended to determine how fast a plasmonic system is able to induce temperature variations in its surrounding medium.