Quantum Technologies and Fundamental Physics in 2D Materials

Two-dimensional (2D) semiconducting materials (and their heterostructures) are next-generation materials relevant for optoelectronics and electronics, as well as integrated photonics and quantum technologies. In this talk, I will first present a broad overview of why 2D materials are interesting for both technologies and fundamental physics. I will then present some of our group’s work on localized excitations for use as single photon emitters (SPEs, for use in quantum communications and computing), as well as a probe for novel physics. I will discuss creation of SPE-like peaks in monolayer MoS₂, by just using ultralow electron beam accelerating voltages (< 5 kV). Secondly, I will discuss localized excitations in near 0-degree twisted MoSe₂/WSe₂ heterostructure, where we observe several sub-meV peaks in photoluminescence (PL) spectra. Power-dependent PL suggests deep localization, and time resolved PL show possible optical cascade nature between these states. If time permits, I will discuss our group’s efforts on creating high-quality 2D materials using chemical vapor deposition.