Measuring and imaging nanomechanical motion with laser light

We discuss several techniques based on laser-driven interferometers and cavities to measure nanomechanical motion. With increasing complexity, they achieve sensitivities reaching from thermal displacement amplitudes, typically at the picometer scale, all the way to the quantum regime, in which radia...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2017-01, Vol.123 (1), p.8-8, Article 8
Main Authors: Barg, Andreas, Tsaturyan, Yeghishe, Belhage, Erik, Nielsen, William H. P., Møller, Christoffer B., Schliesser, Albert
Format: Article
Language:English
Subjects:
Applied physics
Engineering
Imaging
Interferometers
Laser interferometry
Lasers
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Radiation pressure
Sensitivity
“Enlightening the World with the Laser” - Honoring T. W. Hänsch
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Summary:We discuss several techniques based on laser-driven interferometers and cavities to measure nanomechanical motion. With increasing complexity, they achieve sensitivities reaching from thermal displacement amplitudes, typically at the picometer scale, all the way to the quantum regime, in which radiation pressure induces motion correlated with the quantum fluctuations of the probing light. We show that an imaging modality is readily provided by scanning laser interferometry, reaching a sensitivity on the order of 10 fm / Hz 1 / 2 , and a transverse resolution down to 2 μ m . We compare this approach with a less versatile, but faster (single-shot) dark-field imaging technique.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-016-6585-7