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Chinese Optics Letters, Vol. 17, Issue 7, 072301 (2019)

All-optical logic gates and a half-adder based on lithium niobate photonic crystal micro-cavities 

Chenghao Lu, Bing Zhu, Chuanyi Zhu, Licheng Ge, Yian Liu, Yuping Chen*, and Xianfeng Chen

Author Affiliations

  • State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

Abstract

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 a lithium niobate slab or thin film.