Towards cavity-free ground-state cooling of an acoustic-frequency silicon nitride membrane

Towards cavity-free ground-state cooling of an acoustic-frequency silicon nitride membrane

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, po...

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Veröffentlicht in:Applied optics (2004) 2020-08, Vol.59 (22), p.G107-G111
Hauptverfasser: Pluchar, Christian M., Agrawal, Aman R., Schenk, Edward, Wilson, Dalziel J.
Format: Artikel
Sprache:eng
Schlagworte:
Cooling
Force measurement
Membranes
Michelson interferometers
Optics
Physical Sciences
Room temperature
Science & Technology
Silicon nitride
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Zusammenfassung: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. (C) 2020 Optical Society of America
ISSN:1559-128X
2155-3165
1539-4522
DOI:10.1364/AO.394388