Optically levitated nanoparticles offer enormous potential for precision sensing. However, as for any other metrology device, the absolute measurement performance of a levitated-particle sensor is limited by the accuracy of the calibration relating the measured signal to an absolute displacement of the particle. Here, we suggest and demonstrate calibration protocols for levitated-nanoparticle sensors. Our calibration procedures include the treatment of anharmonicities in the trapping potential, as well as a protocol using a harmonic driving force, which is applicable if the sensor is coupled to a heat bath of unknown temperature. Finally, using the calibration, we determine the center-of-mass temperature of an optically levitated particle in thermal equilibrium from its motion and discuss the optimal measurement time required to determine the said temperature.
Calibration and energy measurement of optically levitated nanoparticle sensors.
E. Hebestreit,M. Frimmer,R. Reimann,C. Dellago,F. Ricci,L. Novotný
Published 2017 in Review of Scientific Instruments
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- Publication year
2017
- Venue
Review of Scientific Instruments
- Publication date
2017-11-24
- Fields of study
Materials Science, Physics, Medicine, Engineering
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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