Print Email Facebook Twitter Active feedback cooling of a SiN membrane resonator by electrostatic actuation Title Active feedback cooling of a SiN membrane resonator by electrostatic actuation Author Borrielli, A. (Institute of Materials for Electronics and Magnetism, Nanoscience-Trento-FBK Division; Fondazione Bruno Kessler; IMEM-CNR Institute) Bonaldi, M. (Institute of Materials for Electronics and Magnetism, Nanoscience-Trento-FBK Division; Fondazione Bruno Kessler; IMEM-CNR Institute) Serra, E. (Institute of Materials for Electronics and Magnetism, Nanoscience-Trento-FBK Division; IMEM-CNR Institute; Fondazione Bruno Kessler; Trento Institute for Fundamental Physics and Applications (INFN-TIFPA)) Sarro, Pasqualina M (TU Delft Electronic Components, Technology and Materials) Morana, B. (TU Delft EKL Equipment; TU Delft Electronic Components, Technology and Materials) Date 2021 Abstract Feedback-based control techniques are useful tools in precision measurements as they allow us to actively shape the mechanical response of high quality factor oscillators used in force detection measurements. In this paper, we implement a feedback technique on a high-stress low-loss SiN membrane resonator, exploiting the charges trapped on the dielectric membrane. A properly delayed feedback force (dissipative feedback) enables the narrowing of the thermomechanical displacement variance in a similar manner to the cooling of the normal mechanical mode down to an effective temperature Teff. In the experiment reported here, we started from room temperature and gradually increasing the feedback gain, we were able to cool down the first normal mode of the resonator to a minimum temperature of about 124mK. This limit is imposed by our experimental setup and, in particular, by the injection of the read-out noise into the feedback. We discuss the implementation details and possible improvements to the technique. To reference this document use: http://resolver.tudelft.nl/uuid:1b6886c3-ad48-4c21-a70f-1a0b6b207ac5 DOI https://doi.org/10.1063/5.0049721 Embargo date 2022-01-10 ISSN 0021-8979 Source Journal of Applied Physics, 130 (1), 014502-1 - 014502-11 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2021 A. Borrielli, M. Bonaldi, E. Serra, Pasqualina M Sarro, B. Morana Files PDF 5.0049721.pdf 2.43 MB Close viewer /islandora/object/uuid:1b6886c3-ad48-4c21-a70f-1a0b6b207ac5/datastream/OBJ/view