Towards cavity-free ground-state cooling of an acoustic-frequency silicon nitride membrane
Abstract
We demonstrate feedback cooling of a millimeter-scale, 40 kHz SiN membrane from room temperature to 5 mK (3000 phonons) using a Michelson interferometer, and discuss the challenges to ground state cooling without an optical cavity. This advance appears within reach of current membrane technology, positioning it as a compelling alternative to levitated systems for quantum sensing and fundamental weak force measurements.
- Publication:
-
Applied Optics
- Pub Date:
- August 2020
- DOI:
- 10.1364/AO.394388
- arXiv:
- arXiv:2004.13187
- Bibcode:
- 2020ApOpt..59G.107P
- Keywords:
-
- Quantum Physics;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Physics - Applied Physics;
- Physics - Optics
- E-Print:
- To be published in the Applied Optics special issue: James C. Wyant College of Optical Sciences