 The ATLAS system was developed within the Applied Physics Group at the School of Physics, Trinity College, Dublin.The experimental procedure is relatively straightforward, when compared to lithography or other approaches, meaning that only standard equipment is needed.The set-up consists of an ultrahigh vacuum chamber (base pressure in the low 10−10 Torr range), with the sample mounted at a large working distance (40-100 cm) from the evaporation source.