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Nanoparticle detection in an open-access silicon microcavity

Autor(en)
Stefan Kuhn, Georg Wachter, Franz-Ferdinand Wieser, James Millen, Michael Schneider, Johannes Schalko, Ulrich Schmid, Michael Trupke, Markus Arndt
Abstrakt

We report on the detection of free nanoparticles in a micromachined, open-access Fabry-Pérot microcavity. With a mirror separation of 130 μm, a radius of curvature of 1.3 mm, and a beam waist of 12 μm, the mode volume of our symmetric infrared cavity is smaller than 15 pL. The small beam waist, together with a finesse exceeding 34 000, enables the detection of nanoscale dielectric particles in high vacuum. This device allows monitoring of the motion of individual 150 nm radius silica nanospheres in real time. We observe strong coupling between the particles and the cavity field, a precondition for optomechanical control. We discuss the prospects for optical cooling and detection of dielectric particles smaller than 10 nm in radius and 1 × 10

7 amu in mass.

Organisation(en)
Quantenoptik, Quantennanophysik und Quanteninformation
Externe Organisation(en)
Technische Universität Wien
Journal
Applied Physics Letters
Band
111
Anzahl der Seiten
4
ISSN
0003-6951
DOI
https://doi.org/10.1063/1.5008492
Publikationsdatum
12-2017
Peer-reviewed
Ja
ÖFOS 2012
210006 Nanotechnologie, 103021 Optik
Schlagwörter
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/57feb376-52d5-411b-aa66-73437875d6b3