Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 14: Precision Measurements and Metrology II
Q 14.5: Vortrag
Dienstag, 9. März 2010, 15:15–15:30, A 310
Waveguide gratings as highly reflective mirrors without dielectric coatings — •Daniel Friedrich1, Frank Brückner2, Michael Britzger1, Stefanie Kroker2, Ernst-Bernhard Kley2, Andreas Tünnermann2, Karsten Danzmann1, and Roman Schnabel1 — 1Institut für Gravitationsphysik, Leibniz Universität Hannover und Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut) Callinstrasse 38 D-30167 Hannover — 2Institut für Angewandte Physik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1 D-07743 Jena
Thermal noise in multilayer optical coatings may not only limit the sensitivity of future gravitational wave detectors in their most sensitive frequency band but is also a major impediment for experiments that aim to reach the standard quantum limit or to cool mechanical systems to their quantum ground state.
This talk will give an overview about the progress of waveguide gratings as highly reflective mirrors without multilayer coatings. The best result so far includes a monolithic mirror with a measured reflectivity of 99.8% for normal incidence.