SKM 2023 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 6: Poster

KFM 6.12: Poster

Dienstag, 28. März 2023, 17:00–19:00, P3

Fabrication steps for realization of quantum tokens — •Miriam Mendoza Delgado¹, Julia Heupel¹, Jan Thieme², Johann Peter Reithmaier¹, Kilian Singer², and Cyril Popov¹ — ¹Institute of Nanostructure Technologies and Analytics (INA), Center of Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Germany — ²Institute of Physics, Center of Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Germany

Nitrogen-vacancy (NV) color centers in diamond are fluorescent defects which possess “atom-like” properties and can be implemented as single photon sources with high optical stability and quantum yield, even at room temperature. Furthermore, the coherent electron spin of NV can be used as a long lived qubit which can be applied in quantum information technology, e.g. in quantum repeaters or tokens. In order to enhance the photon emission from NV centers and the collection efficiency, they should be incorporated in photonic structures, like nanopillars. The aim of the current work is the fabrication of diamond nanopillars incorporated with NVs and integrated with microwave antennas and electrodes, for the realization of quantum tokens. The fabrication of arrays of monocrystalline diamond nanopillars with diameters between 150 nm and 250 nm, 1 µm height and center-to-center distance of 10 µm consisted of their definition by electron beam lithography and subsequent inductively coupled plasma reactive ion etching with oxygen. Different techniques are implemented for the creation of NVs, which can affect both their density and properties.