概括
无形碳化 (a-SiC) 薄膜对光子设备具有前景. 增加a-SiC的折射率提高了其非线性特性,为芯片上的光学应用提供了比更广泛的带隙替代品.
科学领域:
- 材料科学 材料科学 材料科学
- 光子学是指光子学的使用方法.
- 非线性光学是非线性光学.
背景情况:
- 碳化 (SiC) 是光子集成电路的一个有前途的材料,由于其优良的光学性能.
- 在绝缘体 (a-SiCOI) 上的无形碳化 (a-SiC) 薄膜可用于晶圆尺度的光子应用.
- a-SiC提供比更宽的带隙,可能减少两个光子的吸收.
研究的目的:
- 调查a-SiC薄膜中折射率和非线性特性之间的关系.
- 评估a-SiC作为高性能芯片内光学应用的材料.
- 为了比较a-SiC与和晶体SiC的非线性性能.
主要方法:
- 使用等离子体增强化学蒸气沉积制造具有不同折射率的三个a-SiCOI样本.
- 在a-SiCOI样本上制造光学波导.
- 使用四波混合测量的非线性折射率的表征.
主要成果:
- a-SiC的折射率的增加与增强的非线性折射率直接相关.
- a-SiC的非线性折射率与的折射率相当.
- a-SiC的折射率更高,非线性比晶体SiC更强.
结论:
- 无形碳化是开发先进光子集成电路的可行材料.
- 与相比,a-SiC提供了一个可调节的平台,具有卓越的非线性光学性能和更宽的带隙.
- 这项研究为基于SiC的新型光子设备铺平了道路,使光学损失最小化.
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