Add to BibSonomy
Abstract
Lithium niobate (LN) crystal plays important roles in future integrated photonics, but it is still a great challenge to efficiently fabricate three-dimensional micro-/nanostructures on it. Here, a femtosecond laser direct writing-assisted liquid back-etching technology (FsLDW-LBE) is proposed to achieve the three-dimensional (3D) microfabrication of lithium niobate (LN) with high surface quality (Ra = 0.422 nm). Various 3D structures, such as snowflakes, graphic arrays, criss-cross arrays, and helix arrays, have been successfully fabricated on the surface of LN crystals. As an example, a microcone array was fabricated on LN crystals, which showed a strong second harmonic signal enhancement with up to 12 times bigger than the flat lithium niobate. The results indicate that the method provides a new approach for the microfabrication of lithium niobate crystals for nonlinear optics.
© 2024 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Tingting Ding, Yongzhi Tang, Hao Li, Shijie Liu, Jing Zhang, Yuanlin Zheng, and Xianfeng Chen
Opt. Lett. 49(5) 1121-1124 (2024)
Haoyang Du, Xiuquan Zhang, Hengyue Lv, Jintian Lin, Lei Wang, and Feng Chen
Opt. Lett. 49(2) 391-394 (2024)
Reinhard Geiss, Sina Saravi, Anton Sergeyev, Séverine Diziain, Frank Setzpfandt, Frank Schrempel, Rachel Grange, Ernst-Bernhard Kley, Andreas Tünnermann, and Thomas Pertsch
Opt. Lett. 40(12) 2715-2718 (2015)