Wafer-scale δ waveguides for integrated two-dimensional photonics

• 成果类型: Article
• 署名作者: Lee, Myungjae; Hong, Hanyu; Yu, Jaehyung; Mujid, Fauzia; Ye, Andrew; Liang, Ce; Park, Jiwoong
• 署名单位: University of Chicago; Seoul National University (SNU); University of Chicago; University of Chicago
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10834
• DOI: 10.1126/science.adi2322
• 发表日期: 2023-08-11
• 页码: 648-653
• 关键词: silicon; propagation

摘要

The efficient, large-scale generation and control of photonic modes guided by van der Waals materials remains as a challenge despite their potential for on-chip photonic circuitry. We report three-atom-thick waveguides-delta waveguides-based on wafer-scale molybdenum disulfide (MoS2) monolayers that can guide visible and near-infrared light over millimeter-scale distances with low loss and an efficient in-coupling. The extreme thinness provides a light-trapping mechanism analogous to a delta-potential well in quantum mechanics and enables the guided waves that are essentially a plane wave freely propagating along the in-plane, but confined along the out-of-plane, direction of the waveguide. We further demonstrate key functionalities essential for two-dimensional photonics, including refraction, focusing, grating, interconnection, and intensity modulation, by integrating thin-film optical components with delta waveguides using microfabricated dielectric, metal, or patterned MoS2.