Min Shucun, Liao Shasha, Zou Changling, Zhang Xinliang, Dong Jianji
Opt Express. 2014 Oct 20;22(21):25947-52. doi: 10.1364/OE.22.025947.
We put forward a route-asymmetrical optical transmission scheme employing optical gradient force, which means that forward and backward propagation of an optical device have different transmittance provided they are not present simultaneously. The device is based on optical gradient force between two single-mode waveguides followed by a Mach-Zehnder interferometer. Our numerical investigation shows that the forward transmittance is about -6 dB while the backward transmittance is suppressed below -20.5 dB in C + L bands. The proposed device is passive, wideband, and compatible with complementary metal-oxide semiconductor (CMOS) process. Furthermore, we demonstrate the applications of route-asymmetrical transmission such as an all-optical switch and all-optical AND gate for all-optical information processing.
我们提出了一种采用光梯度力的路由不对称光传输方案，这意味着光学器件的正向和反向传播在不同时存在的情况下具有不同的透射率。该器件基于两个单模波导之间的光梯度力，后面跟着一个马赫-曾德尔干涉仪。我们的数值研究表明，在C+L波段，正向透射率约为-6 dB，而反向透射率被抑制到-20.5 dB以下。所提出的器件是无源的、宽带的，并且与互补金属氧化物半导体（CMOS）工艺兼容。此外，我们展示了路由不对称传输在全光信息处理中的应用，如全光开关和全光与门。
