Lattice Resonances Excited by Finite-Width Light Beams.
Lattice Resonances Excited by Finite-Width Light Beams.
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DOI：
10.1021/acsomega.2c03847
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发表时间：
2022-09-06
期刊：
影响因子：
4.1
通讯作者：
Manjavacas, Alejandro
中科院分区：
文献类型：
--
作者：
Zundel, Lauren;Deop-Ruano, Juan R.;Martinez-Herrero, Rosario;Manjavacas, Alejandro
金属纳米结构的周期性阵列支持集体晶格共振，从而产生比单个纳米结构的局域等离子体激元的光学响应更强且光谱更窄的光学响应。尽管人们对晶格共振的光学性质进行了广泛的研究，但大多数理论研究都是在平面波激发条件下对其进行分析。这种分析不仅构成了对现实实验条件的近似，需要使用有限宽度的光束，而且还错过了丰富多样的有趣行为。在这里，我们对近轴和非近轴条件下有限宽度光束激发时金属纳米结构周期性阵列的响应进行了全面的研究。我们展示了随着光束宽度的增加，阵列的响应如何变得更加集中并收敛到平面波极限。此外，我们分析了晶格共振的空间范围，并确定了光束宽度的最佳值，以实现最强的光学响应。我们还研究了阵列中有限尺寸效应和光束有限宽度的组合对系统响应的影响。我们的结果提供了一个坚实的理论框架来理解有限宽度光束对晶格共振的激发，并揭示了一系列在平面波激发下不会发生的行为。
Periodic arrays of metallic nanostructures support collective lattice resonances, which give rise to optical responses that are, at the same time, stronger and more spectrally narrow than those of the localized plasmons of the individual nanostructures. Despite the extensive research effort devoted to investigating the optical properties of lattice resonances, the majority of theoretical studies have analyzed them under plane-wave excitation conditions. Such analysis not only constitutes an approximation to realistic experimental conditions, which require the use of finite-width light beams, but also misses a rich variety of interesting behaviors. Here, we provide a comprehensive study of the response of periodic arrays of metallic nanostructures when excited by finite-width light beams under both paraxial and nonparaxial conditions. We show how as the width of the light beam increases, the response of the array becomes more collective and converges to the plane-wave limit. Furthermore, we analyze the spatial extent of the lattice resonance and identify the optimum values of the light beam width to achieve the strongest optical responses. We also investigate the impact that the combination of finite-size effects in the array and the finite width of the light beam has on the response of the system. Our results provide a solid theoretical framework to understand the excitation of lattice resonances by finite-width light beams and uncover a set of behaviors that do not take place under plane-wave excitation.
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影响因子：
3.7
作者：
Fradkin, Ilia M.;Dyakov, Sergey A.;Gippius, Nikolay A.
通讯作者：
Gippius, Nikolay A.
影响因子：
2.1
作者：
Humphrey, A. D.;Barnes, W. L.
通讯作者：
Barnes, W. L.
DOI：
10.1073/pnas.0907459106
发表时间：
2009-11-17
影响因子：
11.1
作者：
Adato, Ronen;Yanik, Ahmet A.;Altug, Hatice
通讯作者：
Altug, Hatice
影响因子：
4
作者：
Chu, Yizhuo;Schonbrun, Ethan;Crozier, Kenneth B.
通讯作者：
Crozier, Kenneth B.
影响因子：
7
作者：
Doiron, Brock;Mota, Monica;Maier, Stefan A.
通讯作者：
Maier, Stefan A.