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波导集成的中红外光探测器和全光学调制器基于在WS2/HfS2异构结构中介层激子的吸收
Shahar Edelstein1, S R K Chaitanya Indukuri1, Noa Mazurski1
1Department of Applied Physics, The Center for Nanoscience and Nanotechnology, The Hebrew University, Jerusalem 91904, Israel.
Nanophotonics (Berlin, Germany)
|December 5, 2024
概括
本研究介绍了一种使用2D范德瓦尔斯异构结构的新型中红外光探测器和调制器. 该设备利用层间激子用于光子应用中的宽带光检测和全光学调制.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 二维 (2D) 范德瓦尔斯半导体通过异构结构的形成,使带隙工程能够为先进的光子设备提供.
- 这些异构结构中的II型带结构导致超快的电荷转移和层间激子 (ILEs) 的形成.
研究的目的:
- 为了首次展示使用ILE吸收的中红外 (中红外) 频谱中的波导合光探测器和调制器.
- 探索2D异构结构在集成光子应用中的潜力.
主要方法:
- 制造一个由单层二硫化物 (WS2) 和几层二硫化物 (HfS2) 组成的异构结构装置.
- 整合异构结构与波导在蓝宝石基板上的整合.
- 在中红外范围的光检测和全光学调制特性的表征.
主要成果:
- 实现了跨越3.8-5.5微米的宽带中红外光检测,响应率为几十个μA/W.
- 在光检测过程中对波导的传输没有显著的影响.
- 通过通过跨频段过渡控制IEE群体,成功实现了波导集成的中红外全光学调制.
结论:
- 开发的WS2/HfS2异构结构是中红外光子设备的一个有前途的平台.
- 该设备可实现高效的光检测和全光学调制,为新的集成光电子应用铺平了道路.
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