RETURN TO ISSUEPREVLETTERNEXT Novel Ultra Localized and Dense Nitrogen Delta-Doping in Diamond for Advanced Quantum Sensing Tzach Jaffe*, Mohammed Attrash, Mohan Kumar Kuntumalla, Roza Akhvlediani, Shaul Michaelson, Lior Gal, Nina Felgen, Miri Fischer, Johann Peter Reithmaier, Cyril Popov, Alon Hoffman, and Meir Orenstein