Electrically driven strain-induced deterministic single-photon emitters in a van der Waals heterostructure

• DOI: 10.1126/sciadv.abj3176
• Publication Date: 2021-10-21T23:38:32Z
• Authors: Jae-Pil So; Ha-Reem Kim; Hyeonjun Baek; Kwang-Yong Jeong; Hoo-Cheol Lee; Woong Huh; Yoon Seok Kim; Kenji Watanabe; Takashi Taniguchi; Jungkil Kim; Chul-Ho Lee; Hong-Gyu Park
• Keywords: Tungsten diselenide; Purcell effect

Quantum confinement in transition metal dichalcogenides (TMDCs) enables the realization of deterministic single-photon emitters. The position and polarization control single photons have been achieved via local strain engineering using nanostructures. However, most existing TMDC-based emitters are operated by optical pumping, while emission sites electrically pumped uncontrolled. Here, we demonstrate driven located at positions where strains induced atomic force microscope indentation on a van der Waals heterostructure consisting graphene, hexagonal boron nitride, tungsten diselenide. optical, electrical, mechanical properties gradient were systematically analyzed. exhibits photon antibunching behavior with g(2)(0) value ~0.3, intensity saturation, linearly cross-polarized doublet, 4 kelvin. This robust spatial will pave way for practical implementation integrated quantum light sources.