Tailoring Polarization in WSe${}_2$ Quantum Emitters through Deterministic Strain Engineering

Abstract

Quantum emitters in transition metal dichalcogenides (TMDs) have recently emerged as a promising platform for generating single photons for optical quantum information processing. In this work, we present an approach for deterministically controlling the polarization of fabricated quantum emitters in a tungsten diselenide (WSe${}_2$) monolayer. We employ novel nanopillar geometries with long and sharp tips to induce a controlled directional strain in the monolayer, and we report on fabricated WSe${}_2$ emitters producing single photons with a high degree of polarization $(99\pm 4\%)$ and high purity ($g^{(2)}(0)=0.030\pm 0.025$). Our work paves the way for the deterministic integration of TMD-based quantum emitters for future photonic quantum technologies.