Delta-Doped GeV^- in Diamond

Owing to its strong optical transition and inversion symmetry, GeV^- centers are an alluring system for engineering many-body physics. However, realizing center-to-center interactions has been a challenge due to the dilute stochastic formation of color centers. In this work, we demonstrate the creation of GeV^- in diamond via in-situ depth localized doping (δ-doping) and discuss ways to overcome this interaction limitation. We report in-situ Germanium incorporation of 0.5 ppm and confinement to a sub-20nm layer. Additionally, we will describe the diamond growth, dopant incorporation, and present the optical characterization.