Ultracompact all-optical logic gates based on nonlinear plasmonic nanocavities

被引：82
作者：
Yang, Xiaoyu [1 ,2 ]
Hu, Xiaoyong [1 ,2 ,3 ]
Yang, Hong [1 ,2 ,3 ]
Gong, Qihuang [1 ,2 ,3 ]
机构：
[1] Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
[2] Peking Univ, Dept Phys, Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
[3] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China
来源：
NANOPHOTONICS | 2017年 / 6卷 / 01期
基金：
中国国家自然科学基金;
关键词：
all-optical logic gates; plasmon-induced transparency; third-order optical nonlinearity; PHOTONIC CRYSTAL; DESIGN;
D O I：
10.1515/nanoph-2016-0118
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
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 mu W 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.
引用
收藏
页码：365 / 376
页数：12
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