[10a-N305-1~10] CS.8 4.5 Nanocarbon and 2D Materials、17 ナノカーボンのコードシェアセッション

▲ [10a-N305-10] Moiré exciton-phonon resonance in WSe₂/MoSe₂ heterobilayer

〇Keisuke Shinokita¹、Yuhei Miyauchi¹、Kenji Watanabe²、Takashi Taniguchi³、Kazunari Matsuda¹ (1.Inst. of Adv. Energy, Kyoto Univ.、2.Research Center for Functional Materials, NIMS、3.International Center for Materials Nanoarchitectonics, NIMS)

キーワード：van der Waals heterostructures, optical properties of moire excitons

Van der Waals heterostructures composed of transition metal dichalcogenides are a fascinating platform to engineer the optically generated excitonic properties through moiré patterns with angular mismatch towards novel quantum phenomena. The moiré pattern as a periodic trap potential can give rise to spatially ordered ensembles of zero-dimensional exciton (moiré exciton), which offers the possibility for dense coherent quantum emitters and quantum simulation of many-body physics. Here, we report the novel excitonic features of the moiré exciton in a twisted WSe₂/MoSe₂ heterobilayer based on near-resonant photoluminescence excitation (PLE) spectroscopy. The PL spectrum strongly depending on the excitation energy shows highly selective excitation of the moiré exciton at phonon resonances.