Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics I
Q 31.69: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1+2
Optical Antennas for Color Centers in Diamond — •Philipp Fuchs1, Thomas Jung1, Hossam Galal2, Mario Agio2, Xiao-Liu Chu3, Stephan Götzinger3, and Christoph Becher1 — 1Universität des Saarlandes, Fakultät NT - Fachrichtung Physik, Campus E2.6, 66123 Saarbrücken — 2Universität Siegen, Laboratorium für Nano-Optik, Walter-Flex-Str. 3, 57072 Siegen — 3Friedrich-Alexander-Universität Erlangen-Nürnberg, Department Physik, 91058 Erlangen
Color centers in diamond, especially the nitrogen and the silicon vacancy center, have become very promising candidates for the implementation of stationary qubits and bright single photon sources. One of the most challenging problems when working with these defects is the low collection efficiency of the photoluminescence photons out of unstructured diamond films. Because of total internal reflection at the diamond-air-interface, this problem cannot be solved simply by using high NA objectives and the collection efficiency is usually limited to a few percent. Here, we show two new approaches to increase this efficiency by precisely controlling the color centers’ dielectric environment. The considered structures are based on thin diamond membranes fabricated via reactive ion etching. Combining the thin membrane with a planar antenna structure allows for creation of tailored radiation patterns, leading to a high directivity and thereby high collection efficiency for all emitters in the membrane at the same time. A radiating dipole in such structures can be calculated analytically, which allows for computer-aided optimization of the structure.