Lattice Resonances for Thermoplasmonics
Lattice Resonances for Thermoplasmonics
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热等离激元学的晶格共振
DOI：
10.1021/acsphotonics.2c01610
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发表时间：
2023
期刊：
影响因子：
7
通讯作者：
Manjavacas, Alejandro
中科院分区：
文献类型：
--
作者：
Zundel, Lauren;Malone, Kellen;Cerdán, Luis;Martínez-Herrero, Rosario;Manjavacas, Alejandro
由于金属纳米结构能够支持局域表面等离子激元，它们已经成为在纳米尺度上将光转化为热的理想工具，从而催生了热塑性领域。当排列成周期性阵列时，金属纳米结构中的局域等离子体可以相干地相互作用，产生一种称为晶格共振的集体模式。这种集体模式的波长由阵列的周期性控制，与单个纳米结构支持的局域等离子体相比，产生了更强、更窄的光谱响应。基于金属纳米颗粒周期性阵列的晶格共振的特殊性质，我们在这里研究了它们在热塑性体中的应用。通过基于耦合偶极子模型的综合分析，我们发现支持晶格共振的阵列比不支持晶格共振的阵列在脉冲照明条件下吸收更多的能量，从而实现更大的温升。相反，对于连续波照明条件，我们发现对于所考虑的系统，温升基本上与阵列周期无关。此外，通过分析每个单位单元含有两个纳米粒子的阵列，我们证明了有可能设计它们的晶格共振来选择性地吸收其中一个纳米粒子中的光，而不激发另一个纳米粒子。这项工作的结果为开发利用晶格共振提供的特殊光学响应和可调性的热塑性材料应用铺平了道路。
Thanks to their ability to support localized surface plasmons, metallic nanostructures have emerged as ideal tools to transduce light into heat at the nanoscale, giving birth to the field of thermoplasmonics. When arranged in a periodic array, the localized plasmons of metallic nanostructures can interact coherently to generate a collective mode known as a lattice resonance. This collective mode, whose wavelength is controlled by the periodicity of the array, produces a stronger and more spectrally narrow optical response than that of the localized plasmons supported by the individual nanostructures. Motivated by the exceptional properties of the lattice resonances of periodic arrays of metallic nanoparticles, here, we investigate their use for applications in thermoplasmonics. Through a comprehensive analysis based on a coupled dipole model, we show that arrays supporting a lattice resonance absorb more energy per nanoparticle, and thus achieve a much larger increase in temperature under pulsed illumination conditions, than those that do not support such a mode. On the contrary, for continuous wave illumination conditions, we find that the temperature increase is mostly independent of the array period for the systems under consideration. Furthermore, by analyzing arrays with two nanoparticles per unit cell, we show that it is possible to engineer their lattice resonances to selectively absorb light in one of the nanoparticles without exciting the other. The results of this work pave the way for the development of thermoplasmonics applications exploiting the exceptional optical response and tunability provided by lattice resonances.
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影响因子：
2.1
作者：
Humphrey, A. D.;Barnes, W. L.
通讯作者：
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影响因子：
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作者：
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