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雅努斯过渡金属化物氧化物单层中的第二次波生成:一项第一原则调查

Peng Su¹, Han Ye¹, Naizhang Sun¹

¹State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.

Nanomaterials (Basel, Switzerland)

|July 29, 2023

概括

雅努斯过渡金属化物氧化物单层显示出对光学设备的第二波生成 (SHG) 的前景. 垂直不对称性增强非线性光学响应,通过应变工程提供可调节性质.

科学领域:

凝聚物质物理学凝聚物质物理学
材料科学材料科学材料科学
纳米光子学纳米光子学

背景情况:

二维 (2D) 简斯结构具有独特的垂直原子不对称性.
这种不对称性诱导了不同的光学反应,使它们适合纳米级光学设备.

研究的目的:

在Janus过渡金属氧化物单层中系统地研究第二波生成 (SHG).
从理论上确定二次非线性光学灵敏度.
探索应变对它们的光学性能的影响.

主要方法:

使用第一原理计算研究了Janus MXO (M = Mo/W,X = S/Se/Te) 单层.
第二阶非线性易感性的理论确定.
研究偏振依赖的SHG反应和应变对带结构的影响.

主要成果:

计算的SHG值与Janus MoSSe单层可比.
X-M-O对称性破坏导致非零的垂直非线性光学元件.
证明了取决于偏振的SHG反应,在急性发作角度下观察到对称性变化.
对MoSO分析了双轴应变对带结构和SHG的影响.

结论:

斯过渡金属化物氧化物单层是非线性光学应用的可行候选者.
它们独特的对称性和可调节性质为设计先进光学设备提供了途径.
这些发现为设计新型光子和光电子设备提供了洞察力.

关键词:

雅努斯的结构就是雅努斯的结构.的光学响应反应.第二个波的第二代波.过渡金属石灰氧化物过渡金属氧化物

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