Multi-order surface lattice resonances and dark mode activation in metallic nanoantenna arrays
Multi-order surface lattice resonances and dark mode activation in metallic nanoantenna arrays
复制标题
金属纳米天线阵列中的多阶表面晶格共振和暗模式激活
DOI：
10.1063/1.5051135
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发表时间：
2019
影响因子：
3.2
通讯作者：
Yongbin Lin
中科院分区：
文献类型：
--
作者：
Rithvik R. Gutha;S. M. Sadeghi;C. Sharp;A. Hatef;Yongbin Lin
金属纳米天线阵列中的表面晶格共振（SLR）是通过其局域表面等离子体共振与瑞利异常的杂交而形成的。在本文中，我们研究了纳米天线间等离子体激元耦合对这种共振的影响，表现出显着偏离的情况下，纳米天线只耦合到阵列的衍射模式。为此，我们研究了一系列金属纳米天线阵列中的SLR，其中它们的纳米天线间间距（晶格常数）沿着它们的短轴在纳米天线的横向模式有效地彼此耦合的极限与它们被很好地分离的情况之间变化。我们的研究结果表明，对于后者的情况下，当入射光的偏振沿着短轴的纳米天线，通过一阶平行耦合形成的SLRs。然而，当我们达到纳米天线间等离子体激元耦合的极限时，SLR的性质发生了变化，变成了二阶正交耦合。我们的研究结果还表明，在纳米天线间的等离子体激元耦合的存在下，纳米天线的禁戒四极子态可以强烈地耦合到光，成为阵列的主要光学特征。对于沿着纳米天线长轴偏振的光，我们证明了一阶红外和二阶近红外SLR在倾斜入射角下的瑞利反常分裂。讨论了这种衍射级在波长复用光学滤波器中的应用。金属纳米天线阵列中的表面晶格共振（SLR）是通过其局域表面等离子体共振与瑞利反常的杂交而形成的。在本文中，我们研究了纳米天线间等离子体激元耦合对这种共振的影响，表现出显着偏离的情况下，纳米天线只耦合到阵列的衍射模式。为此，我们研究了一系列金属纳米天线阵列中的SLR，其中它们的纳米天线间间距（晶格常数）沿着它们的短轴在纳米天线的横向模式有效地彼此耦合的极限与它们被很好地分离的情况之间变化。我们的研究结果表明，对于后者的情况下，当入射光的偏振沿着短轴的纳米天线，通过一阶平行耦合形成的SLRs。然而，当我们达到纳米天线间等离子体激元耦合的极限时，SLR的性质发生了变化，变成了二阶正交耦合。
Surface lattice resonances (SLRs) in arrays of metallic nanoantennas are formed via hybridization of their localized surface plasmon resonances with the Rayleigh Anomaly. In this paper, we study the impact of inter-nanoantenna plasmonic coupling on such resonances, demonstrating a significant departure from the cases where the nanoantennas are only coupled to the diffraction modes of the arrays. For this, we study SLRs in a series of metallic nanoantenna arrays wherein their inter-nanoantenna spacings (lattice constants) along their short axes are varied between the limits where transverse modes of the nanoantennas are efficiently coupled to each other to the case where they are well separated. Our results show that for the latter case, when the incident light is polarized along the short axes of the nanoantennas, SLRs are formed via first order parallel coupling. As we reach the limit of inter-nanoantenna plasmonic coupling, however, the nature of SLRs is changed, becoming a second order orthogonal coupling. Our results also show that in the presence of inter-nanoantenna plasmonic coupling, the forbidden quadrupole state of nanoantennas can strongly couple to light, becoming the dominant optical feature of the arrays. For light polarized along the long axes of the nanoantennas, we demonstrate the Rayleigh Anomaly splitting of first order infrared and second order near-infrared SLRs under oblique incident angles. Wavelength multiplex optical filter application of such diffraction orders is discussed.Surface lattice resonances (SLRs) in arrays of metallic nanoantennas are formed via hybridization of their localized surface plasmon resonances with the Rayleigh Anomaly. In this paper, we study the impact of inter-nanoantenna plasmonic coupling on such resonances, demonstrating a significant departure from the cases where the nanoantennas are only coupled to the diffraction modes of the arrays. For this, we study SLRs in a series of metallic nanoantenna arrays wherein their inter-nanoantenna spacings (lattice constants) along their short axes are varied between the limits where transverse modes of the nanoantennas are efficiently coupled to each other to the case where they are well separated. Our results show that for the latter case, when the incident light is polarized along the short axes of the nanoantennas, SLRs are formed via first order parallel coupling. As we reach the limit of inter-nanoantenna plasmonic coupling, however, the nature of SLRs is changed, becoming a second order orthogonal coupl...
影响因子：
9.7
作者：
Dickerson, Erin B.;Dreaden, Erik C.;El-Sayed, Mostafa A.
通讯作者：
El-Sayed, Mostafa A.