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9 September 2019 Precision sensing and opto-mechanics with optically levitated nanoparticles (Conference Presentation)
Andrew Geraci
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Proceedings Volume 11083, Optical Trapping and Optical Micromanipulation XVI; 110830S (2019) https://doi.org/10.1117/12.2529792
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States
Abstract
In high vacuum, optically-levitated dielectric nanospheres achieve excellent decoupling from their environment, making them ideal for precision force sensing. We have shown that 300 nm silica spheres can be used for calibrated zeptonewton force measurements in a standing-wave optical trap. The sensitivity achieved exceeds that of any conventional room-temperature solid-state force sensor by over an order of magnitude, and enables a variety of applications including electric field sensing, inertial sensing, and gravimetry. I will describe our progress towards using these sensors for tests of the Newtonian gravitational inverse square law at micron length scales. Optically levitated dielectric objects also show promise for a variety of other applications, including searches for gravitational waves, and experiments in quantum optomechanics.
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Andrew Geraci "Precision sensing and opto-mechanics with optically levitated nanoparticles (Conference Presentation)", Proc. SPIE 11083, Optical Trapping and Optical Micromanipulation XVI, 110830S (9 September 2019); https://doi.org/10.1117/12.2529792
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KEYWORDS
Optomechanical design
Nanoparticles
Dielectrics
Sensors
Calibration
Environmental sensing
Optical spheres
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