Jiang Liyong, Yin Tingting, Dubrovkin Alexander M, Dong Zhaogang, Chen Yuntian, Chen Weijin, Yang Joel K W, Shen Zexiang
1Department of Physics, School of Science, Nanjing University of Science and Technology, Nanjing, 210094 China.
2Centre for Disruptive Photonic Technologies, The Photonics Institute, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371 Singapore.
Light Sci Appl. 2019 Feb 6;8:21. doi: 10.1038/s41377-019-0134-1. eCollection 2019.
Considerable attention has been paid recently to coherent control of plasmon resonances in metadevices for potential applications in all-optical light-with-light signal modulation and image processing. Previous reports based on out-of-plane coherent control of plasmon resonances were established by modulating the position of a metadevice in standing waves. Here we show that destructive and constructive absorption can be realized in metallic nano-antennas through in-plane coherent control of plasmon resonances, which is determined by the distribution rule of electrical-field components of nano-antennas. We provide proof-of-principle demonstrations of plasmonic switching effects in a gold nanodisk monomer and dimer, and propose a plasmonic encoding strategy in a gold nanodisk chain. In-plane coherent control of plasmon resonances may open a new avenue toward promising applications in optical spectral enhancement, imaging, nanolasing, and optical communication in nanocircuits.
最近，超构器件中等离激元共振的相干控制受到了广泛关注，有望应用于全光光光信号调制和图像处理。先前基于离面等离激元共振相干控制的报道是通过调制超构器件在驻波中的位置来实现的。在此，我们表明，通过纳米天线等离激元共振的面内相干控制，可以在金属纳米天线中实现相消吸收和相长吸收，这由纳米天线电场分量的分布规律决定。我们提供了金纳米盘单体和二聚体中等离激元开关效应的原理验证演示，并提出了金纳米盘链中的等离激元编码策略。等离激元共振的面内相干控制可能为纳米电路中的光谱增强、成像、纳米激光和光通信等有前景的应用开辟一条新途径。
