Tip-induced nanoscale domain engineering in x-cut lithium niobate on insulator

Authors

• Jianan Ma, Nanjing University
• Ningchong Zheng, Nanjing University
• Pengcheng Chen, Nanjing University
• Xiaoyi Xu, Nanjing University
• Yunzhi Zhu, Nanjing Vocational University of Industry Technology
• Yuefeng Nie, Nanjing University
• Shining Zhu, Nanjing University, China
• Min Xiao, University of Arkansas, Fayetteville
• Yong Zhang, Nanjing University

Document Type

Article

Publication Date

2024

Keywords

photonics, lithium niobate, optoelectronics

Abstract

Nanodomain engineering in lithium niobate on insulator (LNOI) is critical to realize advanced photonic circuits. Here, we investigate the tip-induced nanodomain formation in x-cut LNOI. The effective electric field exhibits a mirror symmetry, which can be divided into preceding and sequential halves according to the tip movement. Under our configuration, the preceding electric field plays a decisive role rather than the sequential one as in previous reports. The mechanism is attributed to the screening field formed by the preceding field counteracting the effect of the subsequent one. In experiment, we successfully fabricate nanodomain dots, lines, and periodic arrays. Our work offers a useful approach for nanoscale domain engineering in x-cut LNOI, which has potential applications in integrated optoelectronic devices.

Citation

Jianan Ma, Ningchong Zheng, Pengcheng Chen, Xiaoyi Xu, Yunzhi Zhu, Yuefeng Nie, Shining Zhu, Min Xiao, and Yong Zhang, "Tip-induced nanoscale domain engineering in x-cut lithium niobate on insulator," Opt. Express 32, 14801-14807 (2024) https://doi.org/10.1364/OE.518885