Single molecule DNA detection with an atomic vapor notch filter Denis Uhland, Torsten Rendler, Matthias Widmann, Sang-Yun Lee, Jörg Wrachtrup and Ilja Gerhardt EPJ Quantum Technol., 2 1 (2015) 20 Published online: 26 August 2015 DOI: 10.1140/epjqt/s40507-015-0033-1