Optical Control over Thermal Distributions in Topologically Trivial and Non-Trivial Plasmon Lattices
Optical Control over Thermal Distributions in Topologically Trivial and Non-Trivial Plasmon Lattices
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DOI：
10.1021/acsphotonics.2c01155
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发表时间：
2022-10-14
期刊：
影响因子：
7
通讯作者：
Masiello, David J.
中科院分区：
文献类型：
--
作者：
Bourgeois, Marc R.;Rossi, Andrew W.;Masiello, David J.
从等离子体阵列的离散空间周期性中出现的表面晶格共振（SLR）的特征在于色散的高质量极化激元模式，其可以在其光子带结构中的特定点处由具有不同频率、偏振和入射角的平面波光选择性地激发。室温下激子极化激元的玻色-爱因斯坦凝聚、激光和非线性物质波物理都起源于SLR系统，但迄今为止，很少有人关注它们的热行为。在这里，我们结合联合收割机的分析理论和数值计算，研究光热性能的SLR周期性的1D和2D阵列的等离子体纳米粒子耦合到彼此和电磁远场通过横向辐射。具体来说，我们演示了如何创建稳态SLR热梯度跨越从纳米级到数百微米，是主动可控的使用光，尽管热扩散。我们还展示了令人惊讶的能力，局部化的热梯度在拓扑非平凡的SLR二聚体晶格的晶格边缘，从而建立一类非凡的热响应，是非常规的普通材料。这项工作揭示了一个新的方向，在热等离子体，才刚刚开始探索。
Emergent from the discrete spatial periodicity of plasmonic arrays, surface lattice resonances (SLRs) are characterized as dispersive, high-quality polaritonic modes that can be selectively excited at specific points in their photonic band structure by plane-wave light of varying frequency, polarization, and angle of incidence. Room-temperature Bose- Einstein condensation of exciton polaritons, lasing, and nonlinear matter-wave physics have all found origins in SLR systems, but to date, little attention has been paid to their thermal behavior. Here, we combine analytical theory and numerical calculations to investigate the photothermal properties of SLRs in periodic 1D and 2D arrays of plasmonic nanoparticles coupled to each other and to the electromagnetic far-field via transverse radiation. Specifically, we demonstrate how to create steady-state SLR thermal gradients spanning from the nanoscale to hundreds of microns that are actively controllable using light in spite of heat diffusion. We also demonstrate the surprising ability to localize thermal gradients at the lattice edges in topologically non-trivial SLR dimer lattices, thereby establishing a class of extraordinary thermal responses that are unconventional in ordinary materials. This work exposes a new direction in thermoplasmonics that has only just now begun to be explored.