Ultracompact all-optical logic gates based on nonlinear plasmonic nanocavities

Nanophotonics

article

Xiaoyu Yang¹  Xiaoyong Hu¹  Hong Yang¹  Qihuang Gong¹ 

[1] State Key Laboratory for Mesoscopic Physics and Department of Physics, Collaborative Innovation Center of Quantum Matter, Peking University;Collaborative Innovation Center of Extreme Optics, Shanxi University

关键词: all-optical logic gates;    plasmon-induced transparency;    third-order optical nonlinearity;   

DOI  :  10.1515/nanoph-2016-0118

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

In this study, nanoscale integrated all-optical XNOR, XOR, and NAND logic gates were realized based on all-optical tunable on-chip plasmon-induced transparency in plasmonic circuits. A large nonlinear enhancement was achieved with an organic composite cover layer based on the resonant excitation-enhancing nonlinearity effect, slow light effect, and field confinement effect provided by the plasmonic nanocavity mode, which ensured a low excitation power of 200 μW that is three orders of magnitude lower than the values in previous reports. A feature size below 600 nm was achieved, which is a one order of magnitude lower compared to previous reports. The contrast ratio between the output logic states “1” and “0” reached 29 dB, which is among the highest values reported to date. Our results not only provide an on-chip platform for the study of nonlinear and quantum optics but also open up the possibility for the realization of nanophotonic processing chips based on nonlinear plasmonics.

【 授权许可】

CC BY