Ferroelectric Domain Control of Nonlinear Light Polarization in MoS 2 via PbZr 0.2 Ti 0.8 O 3 Thin Films and Free‐Standing Membranes
Ferroelectric Domain Control of Nonlinear Light Polarization in MoS 2 via PbZr 0.2 Ti 0.8 O 3 Thin Films and Free‐Standing Membranes
复制标题
通过 PbZr 0.2 Ti 0.8 O 3 薄膜和独立式膜对 MoS 2 中非线性光偏振的铁电域控制
DOI：
10.1002/adma.202208825
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发表时间：
2022
影响因子：
29.4
通讯作者：
Hong, Xia
中科院分区：
文献类型：
--
作者：
Li, Dawei;Huang, Xi;Wu, Qiuchen;Zhang, Le;Lu, Yongfeng;Hong, Xia
二维（2D）过渡金属二硫属化物（TMDC）如MoS2表现出异常强的非线性光学响应，而TMDC中非线性光的振幅、极性方向和相位的纳米级控制仍然具有挑战性。在这项工作中，通过将单层 MoS2 与外延 PbZr0.2Ti0.8O3(PZT) 薄膜和独立式 PZT 膜连接，二次谐波产生 (SHG) 信号的幅度和偏振通过铁电域图案进行调制，这表明 PZT 膜可以导致非线性光偏振的操作编程。 MoS2极轴与PZT的面外极域或域壁的面内偏振的界面耦合将SHG光偏振定制成具有不同对称性的不同模式，这些模式通过非线性电磁理论进行建模。这项研究提供了一个新的材料平台，可以在纳米尺度上实现光偏振的可重构设计，为开发新型光学信息处理、智能光调制器和集成光子电路铺平道路。
Two‐dimensional (2D) transition metal dichalcogenides (TMDCs) such as MoS2exhibit exceptionally strong nonlinear optical responses, while nanoscale control of the amplitude, polar orientation, and phase of the nonlinear light in TMDCs remains challenging. In this work, by interfacing monolayer MoS2with epitaxial PbZr0.2Ti0.8O3(PZT) thin films and free‐standing PZT membranes, the amplitude and polarization of the second harmonic generation (SHG) signal are modulated via ferroelectric domain patterning, which demonstrates that PZT membranes can lead to in‐operando programming of nonlinear light polarization. The interfacial coupling of the MoS2polar axis with either the out‐of‐plane polar domains of PZT or the in‐plane polarization of domain walls tailors the SHG light polarization into different patterns with distinct symmetries, which are modeled via nonlinear electromagnetic theory. This study provides a new material platform that enables reconfigurable design of light polarization at the nanoscale, paving the path for developing novel optical information processing, smart light modulators, and integrated photonic circuits.