In-plane coherent control of plasmon resonances for plasmonic switching and encoding

• Main Authors: Jiang, Liyong, Yin, Tingting, Dubrovkin, Alexander M., Dong, Zhaogang, Chen, Yuntian, Chen, Weijin, Yang, Joel K. W., Shen, Zexiang
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2019
• Subjects: Science::Physics; Nanoparticles; Nanophotonics and Plasmonics
• Online Access: https://hdl.handle.net/10356/90010; http://hdl.handle.net/10220/49371
• Institution: Nanyang Technological University

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.