Rostock 2019 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 37: Precision Measurements and Metrology II
Q 37.1: Talk
Wednesday, March 13, 2019, 14:00–14:15, S SR 111 Maschb.
Carrier Density Fluctuations as a source of noise in gravitational wave detectors — •Florian Feilong Bruns1, Johannes Dickmann1, Daniel Heinert2, Ronny Nawrodt3, and Stefanie Kroker1, 4 — 1Physikalisch-Technische Bundesanstalt Bundesallee 100, 38116 Braunschweig, Germany — 2Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany — 35. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany — 4LENA Laboratory for Emerging Nanometrology, Technische Universität Braunschweig, Am langen Kamp 6 b, 380106 Braunschweig, Germany
The quantification and mitigation of noise is a critical task to push the sensitivity of gravitational wave detectors to the ultimate limit. In this contribution we theoretically investigate the noise induced by carrier density fluctuations in semiconductors. The Debye screening related to this type of fluctuations increases the correlation of the fluctuations and thus increases the noise amplitude at frequencies above 1 kHz. The first results on silicon and gallium arsenide as test mass materials indicate that the noise amplitude of carrier density noise is bigger than the SQL for frequencies larger than 10kHz.