Qiang Cao

May 15, 2024 | mdpi.com | Chenyu Wang |Qiang Cao |Jihu Zheng |Haixin Duan

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Apr 2, 2024 | opg.optica.org | Xiaoliang Wang |Ruonan Wang |Qiang Cao |Fengchang Li

We experimentally demonstrate the highly-efficient nonlocal erasing and writing of ferroelectric domains using a femtosecond laser in lithium niobate. Based on the induction of a focused infrared femtosecond laser without any relative displacement or additional treatment, the original multiple ferroelectric domains can be either erased (erasing operation) or elongated (writing operation) simultaneously in the crystal, depending on the laser focusing depth and the laser pulse energy.

Mar 17, 2024 | mdpi.com | Dongxue Zhao |Yingli Cao |Jinpeng Li |Qiang Cao

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Feb 15, 2024 | opg.optica.org | Xiaoliang Wang |Ruonan Wang |Qiang Cao

We experimentally extend the nonlinear Gaussian to flat-top beam shaping from one to two dimensions through a three-dimensional nonlinear photonic crystal. Employing a near-infrared femtosecond laser, we induce a modification inside lithium niobate to achieve a second-order nonlinear optical coefficient modulation in three dimensions. The flat-topped truncation of wavefront has been adjusted in a mutual perpendicular coordinate separately.

Nov 15, 2023 | mdpi.com | Kaijun Liu |Qiang Cao |Guosheng Xu |Guoai Xu

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