Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 89, Issue 3, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.5017119
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Funding
- NCCR-QSIT program [51NF40-160591]
- Swiss National Science Foundation [200021L 169319]
- Austrian Science Fund [I 3163]
- Swiss National Science Foundation (SNF) [200021L_169319] Funding Source: Swiss National Science Foundation (SNF)
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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. Published by AIP Publishing.
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