Lu Cuicui, Hu Xiaoyong, Yang Hong, Gong Qihuang
State Key Laboratory for Mesoscopic Physics & Department of Physics, Peking University, Beijing 100871, People's Republic of China.
Sci Rep. 2013 Sep 27;3:2778. doi: 10.1038/srep02778.
Optical computing uses photons as information carriers, opening up the possibility for ultrahigh-speed and ultrawide-band information processing. Integrated all-optical logic devices are indispensible core components of optical computing systems. However, up to now, little experimental progress has been made in nanoscale all-optical logic discriminators, which have the function of discriminating and encoding incident light signals according to wavelength. Here, we report a strategy to realize a nanoscale all-optical logic discriminator based on plasmonic bandgap engineering in a planar plasmonic microstructure. Light signals falling within different operating wavelength ranges are differentiated and endowed with different logic state encodings. Compared with values previously reported, the operating bandwidth is enlarged by one order of magnitude. Also the SPP light source is integrated with the logic device while retaining its ultracompact size. This opens up a way to construct on-chip all-optical information processors and artificial intelligence systems.
光学计算使用光子作为信息载体，为超高速和超宽带信息处理开辟了可能性。集成全光逻辑器件是光学计算系统不可或缺的核心组件。然而，到目前为止，纳米级全光逻辑鉴别器几乎没有取得实验进展，这种鉴别器具有根据波长对入射光信号进行鉴别和编码的功能。在此，我们报告一种基于平面等离子体微结构中的等离子体带隙工程来实现纳米级全光逻辑鉴别器的策略。落入不同工作波长范围内的光信号被区分并赋予不同的逻辑状态编码。与先前报道的值相比，工作带宽扩大了一个数量级。此外，表面等离激元光源与逻辑器件集成在一起，同时保持其超紧凑尺寸。这为构建片上全光信息处理器和人工智能系统开辟了一条道路。
