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13 March 2024 Levitated optomechanics for directional dark matter searches
Jonathan M. Gosling, Fiona Alder, Robert James, Eva Kilian, Chamkaur Ghag, Peter F. Barker, Markus Rademacher
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Proceedings Volume PC12912, Quantum Sensing, Imaging, and Precision Metrology II; PC129120V (2024) https://doi.org/10.1117/12.2691101
Event: SPIE Quantum West, 2024, San Francisco, California, United States
Abstract
The isolation afforded by levitated optomechanics, combined with the ability to detect ultraweak forces in three directions, makes them particularly interesting for directional dark searches. This directionality allows 3D reconstruction of an interaction with increased background rejection, even with only a few detection events. We will discuss a levitated sensor that is being developed to place new bounds on composite dark matter by detecting their collisions with trapped nanoparticles. We will describe the 3-D electrical cold damping scheme used in this experiment as well as the electrode configuration that allow us to provide a well-defined directional impulse calibration. We will also present a preliminary analysis of the first experimental data run that is currently underway.
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Jonathan M. Gosling, Fiona Alder, Robert James, Eva Kilian, Chamkaur Ghag, Peter F. Barker, and Markus Rademacher "Levitated optomechanics for directional dark matter searches", Proc. SPIE PC12912, Quantum Sensing, Imaging, and Precision Metrology II, PC129120V (13 March 2024); https://doi.org/10.1117/12.2691101
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KEYWORDS
Optomechanical design
Sensors
3D modeling
Calibration
Electrodes
Nanoparticles
Optical coherence
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