标题： 按需共振等离子体纳米颗粒 显示英文标题

标题： Resonances On-Demand for Plasmonic Nano-Particles

摘要： 一种设计具有所需共振光谱的等离子体粒子的方法被提出。 该方法基于对初始粒子形状进行重复扰动，同时计算各种准静态共振的特征值。 该方法经过严格证明，确保对于任何所需的光谱共振位置都存在解。 通过我们的方法设计的覆盖可见光和近红外区域的共振，使用有限差分时域模拟进行了验证。 设计了一种具有共位偶极子-四极子共振的新一类粒子，展示了该方法的独特威力。 这种按需工程实现了纳米天线和超材料的严格实现，适用于需要特定光谱函数的各种应用。 显示英文摘要

摘要： A method for designing plasmonic particles with desired resonance spectra is presented. The method is based on repetitive perturbations of an initial particle shape while calculating the eigenvalues of the various quasistatic resonances. The method is rigorously proved, assuring a solution exists for any required spectral resonance location. Resonances spanning the visible and the near-infrared regimes, as designed by our method, are verified using finite-difference time-domain simulations. A novel family of particles with collocated dipole-quadrupole resonances is designed, demonstrating the unique power of the method. Such on-demand engineering enables strict realization of nano-antennas and metamaterials for various applications requiring specific spectral functions.