ISBN 9783843935142

978-3-8439-3514-2, Reihe Physik

Thomas Wolf
On Magnetometry Using Ensembles of Defect Centers in Diamond

105 Seiten, Dissertation Universität Stuttgart (2018), Softcover, A5

Zusammenfassung / Abstract

Modern scientific world relies on measurement and control of physical quantities in numerous ways. Suitable sensors are at the heart of reproducible, objective measurements and essential part of any electronic regulatory network. The number of measurable quantities of interest in fundamental science, life science and engineering is ample as is the number of available sensor approaches for each of these quantities. When choices are made between sensor solutions many aspects can influence decision-makers. Sensor power consumption, ease of implementation and calibration, working range with respect to the measurable average quantity size and bandwidth but also with respect to external conditions (e.g. temperature, chemical environment), size and price as well as reliability constraints but naturally also development traditions and simply ignorance decide on whether a specific approach is chosen for a specific measurement problem. Among these, sensors on the basis of color centers in solid state host materials, most prominently the NV center in diamond, have attracted some interest in recent years. With view to the above mentioned criteria these sensors combine virtues of the host material diamond with those of optically addressable NV centers acting as sensor molecules within the host. Diamond as a chemically robust, bio-compatible material can enable sensor applications in a wide range of working conditions (temperature > 1000 °C, pressure > GPa) well beyond the limits of well-established semiconductor platforms. On the other hand NV centers offer the potential for high sensitivity, high dynamic range acquisition of different physical quantities (magnetic field, temperature, pressure, electric field) via optical detection of spin properties (optically detected magnetic resonance).