[17a-A35-1~9] 4.5 Nanocarbon and 2D Materials

10:45 AM - 11:15 AM JST(1:45 AM - 2:15 AM UTC)English Presentation

[17a-A35-6] [JSAP-Optica Joint Symposia Invited Talk] Exciton transfer and interface excitons in mixed-dimensional heterostructures

〇Nan Fang¹, Yih-Ren Chang¹, Shun Fujii^1,2, Daiki Yamashita^1,3, Mina Maruyama⁴, Yanlin Gao⁴, Chee Fai Fong¹, Daichi Kozawa^1,5, Keigo Otsuka^1,6, Kosuke Nagashio⁶, Susumu Okada⁴, Yuichiro Kato¹ (1.RIKEN, 2.Keio Univ., 3.AIST, 4.Univ. of Tsukuba, 5.NIMS, 6.UTokyo)

Keywords:

carbon nanotube,tungsten diselenide,mixed-dimensional heterostructure

Two-dimensional van der Waals heterostructures have introduced unconventional phenomena that emerge at atomically precise interfaces, and further development is expected in mixed-dimensional heterostructures. Here we discuss exciton physics in 1D-2D heterostructures consisting of one-dimensional carbon nanotubes and two-dimensional tungsten diselenide. For small band gap nanotubes corresponding to type I band alignment, exciton transfer is observed. For large band gap nanotubes corresponding to type II band alignment, exciton transfer diminishes whereas bright emission peaks originating from the interface are identified. We assign the peaks to interface excitons as they only appear in type-II heterostructures. With mixed-dimensional van der Waals heterostructures where band alignment can be engineered, new opportunities for quantum photonics are envisioned.