(Invited) Opportunities and Challenges for Quantum Emitters in One and Two Dimensional Materials

Abstract

The last five years have witnessed dramatic advances in realization of quantum emitters (QEs) in one dimensional carbon nanotubes and two dimensional layered semiconductors. These novel QEs offer exciting opportunities for not only storing, processing and transducing of quantum information but also sensing physical phenomena beyond classical detection limits. Realization of these opportunities also present multiple challenges including: (1) realizing room temperature, telecommunication wavelength operation; (2) controlling fundamental as well as quantum optical properties such as QE emission wavelengths, linewidths, polarization, coherent times, single photon purity and indistinguishability; (3) deterministic placement and integration of QEs into photonic, plasmonic, and mangnonic platforms for quantum sensing and transduction applications. Here in this talk I will present recent efforts toward meeting these challenges. In 1D carbon nanotubes, we recently demonstrated that chemical binding configuration of covalent quantum defects can be controlled through the spin multiplicity of photoexcited intermediates. This enable us to control the emission wavelength of QEs by creating previously inaccessible chemical configuration. In 2D semiconductor, we have successfully created the telecommunication wavelength quantum emitters by local strain engineering of MoTe2. We have also realized chiral quantum emitters via exploit of magnetic proximity interaction between quantum emitters of WSe2 monolayer and localized magnetization crated in NiPS3 anti-ferromagnetic insulator by nanoscale stain engineering.