Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 30: Optomechanics II
Q 30.2: Vortrag
Dienstag, 6. März 2018, 14:15–14:30, K 0.023
Thermal noise performance of metamirrors — •Johannes Dickmann1, Carol Bibiana Rojas Hurtado1, Ronny Nawrodt2, and Stefanie Kroker1,3 — 1Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany — 2Friedrich-Schiller-Universitaet Jena, Institut fuer Festkoerperphysik, Helmholtzweg 5, 07743 Jena, Germany — 3Technische Universitaet Braunschweig, LENA Laboratory for Emerging Nanometrology, Pockelsstraße 14, 38106 Braunschweig, Germany
Many optical and optomechanical applications are limited by the thermal noise of their components (e.g. gravitational wave detectors and cavities for laser stabilization). In a wide spectral range, the Brownian thermal noise of the optical coatings dominates the noise level. Promising alternatives to conventional multilayer mirrors are nanostructured surfaces (so called metamirrors). We achieved a unified method for the calculation of Brownian thermal noise of arbitrary shaped linear optical elements based on the Fluctuation-Dissipation theorem approach. A semi-analytical investigation of Brownian thermal noise of binary sub-wavelength grating mirrors shows a decrease of the noise power spectral density by a factor of up to 104, compared to conventional mirrors under representative conditions.