在被波克尔斯效应照明下的石墨烯/6H-SiC内部电场的研究
Optics express
|October 20, 2023
概括
本研究提出了一种使用波克尔斯效应绘制晶体电场图的新方法. 该技术成功地测量了6H-SiC中的空间电荷形成,克服了诸如双折射和热效应等挑战.
科学领域:
- 材料科学 材料科学 材料科学
- 光学是什么?光学是什么?光学是什么?
- 固态物理 固态物理
背景情况:
- 电光波克尔斯效应对于用电场调节光线至关重要.
- 像6H-SiC这样的双断晶体表现出由内部场所影响的复杂光学特性.
- 准确地绘制内部电场的地图对于设备的表征至关重要.
研究的目的:
- 开发和演示一种用于绘制Pockels晶体内部电场配置文件的方法.
- 在照明下研究6H-SiC中的空间电荷形成.
- 为了应对双折射和热光学效应所带来的实验挑战.
主要方法:
- 利用电光波克尔效应来测量极化光的相差.
- 雇佣一个Soleil-Babinet补偿员来管理双重违规.
- 在6H-SiC晶体上用石墨烯电极进行测量.
- 考虑激光诱导的晶体加热效应.
主要成果:
- 在6H-SiC晶体中成功地映射了内部电场配置文件.
- 在半绝缘6H-SiC中观察到显著的空间电荷形成,在波段间隙以上的照明下.
- 已证明有效地补偿双折射和热光学效应.
结论:
- 开发的方法可以适应各种波克尔斯晶体.
- 该技术为电场分布和空间电荷动态提供了宝贵的见解.
- 这项工作有助于更好地理解和描述光学和电压下的半导体材料.
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