Moiré ferroelectricity modulates light emission from a semiconductor monolayer

• DOI: 10.1126/sciadv.adt7789
• Publication Date: 2025-05-09T17:58:21Z
• Authors: Dong Seob Kim; Chengxin Xiao; Roy C. Dominguez; Zhida Liu; Hamza Abudayyeh; Kyoungpyo Lee; Rigo Mayorga-Luna; Hyunsue Kim; Kenji Watanabe; Takashi Taniguchi; Chih-Kang Shih; Yoichi Miyahara; Wang Yao; Xiaoqin Li
• Keywords: Light emission

Semiconductor moiré superlattices, characterized by their periodic spatial light emission, unveil a new paradigm of engineered photonic materials. Here, we show that ferroelectric domains formed in twisted hexagonal boron nitride (t-hBN) substrate can modulate emission from an adjacent semiconductor MoSe 2 monolayer. The electrostatic potential at the surface t-hBN provides simple way to confine excitons confined within and domain walls are spectrally separated because pronounced Stark shift. Moreover, patterned be dynamically controlled electrically gating domains, introducing functionality beyond other superlattices. Our findings chart exciting pathway for integrating nanometer-scale with various optically active functional layers, paving advanced nanophotonics metasurfaces.