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Q: Fachverband Quantenoptik und Photonik
Q 30: Poster Präzisionsmessungen und Metrologie
Q 30.5: Poster
Tuesday, March 11, 2008, 16:30–19:00, Poster C2
High reflectivity grating waveguide coatings — •Daniel Friedrich1, Oliver Burmeister1, Michael Britzger1, Tina Clausnitzer2, Frank Brückner2, Ernst-Bernhard Kley2, Andreas Tünnermann2, Karsten Danzmann1, and Roman Schnabel1 — 1Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut) und Institut für Gravitationsphysik der Leibniz Universität Hannover, Callinstr. 38, 30167 Hannover — 2Institut für Angewandte Physik der Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena
Thin single-layer grating structures can be used as a high reflectivity, but low thermal noise, alternative to conventional multilayer coatings. Grating waveguide (GWG) coatings should have low mechanical loss due to the reduced coating thickness, resulting in low thermal noise. Since the coating provides the interface between a light field and a mirror device, coating thermal noise is an important design concern for various high precision experiments such as gravitational wave detection. We present concepts and ongoing investigations of different types of GWG's.