All-optical logic gates and a half-adder based on lithium niobate photonic crystal micro-cavities
All-optical logic gates including AND, XOR, and NOT gates, as well as a half-adder, are realized based on two-dimensional lithium niobate photonic crystal (PhC) circuits with PhC micro-cavities. The proposed all-optical devices have an extinction ratio as high as 23 dB due to the effective all-optical switch function induced by two-missing-hole micro-cavities. These proposed devices can have potential implementation of complex integrated optical functionalities including all-optical computing in lithium niobate slab or thin film.
作者单位：Shanghai Jiao Tong University
Lu Chenghao,Zhu Bing,Zhu Chuanyi,Ge Licheng,Liu Yi''an,Chen Yuping,Chen Xianfeng. All-optical logic gates and a half-adder based on lithium niobate photonic crystal micro-cavities[J].Chinese Optics Letters,2019,17(7):07.