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4 August 2021 Microspheres with atomic-scale tolerances generate hyper-degeneracy
Jacob Kher-Alden, Tal Carmon, Mark Douvidzon, Lev Deych
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Proceedings Volume 11798, Optical Trapping and Optical Micromanipulation XVIII; 117980S (2021) https://doi.org/10.1117/12.2595201
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
Highly symmetrical objects are important to a manifold of applications such as precise measurements and sensing. However, creating a perfect sphere proves to be experimentally extremely difficult, as gravity and the support deform the sphere from its perfect shape. In this work, we optically levitate a micro oil droplet and activate it as whispering gallery mode optical resonator. Our contactless resonator displays a sphericity of less than one Ångström for a 10 µm radius droplet and is therefore one of the roundest objects there is. Additionally, we demonstrate an unprecedented resonance enhancement defined by “optical quality” over “mode volume” and lastly, benefitting from the high sphericity, we lift degeneracies of order higher than 200.
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Jacob Kher-Alden, Tal Carmon, Mark Douvidzon, and Lev Deych "Microspheres with atomic-scale tolerances generate hyper-degeneracy", Proc. SPIE 11798, Optical Trapping and Optical Micromanipulation XVIII, 117980S (4 August 2021); https://doi.org/10.1117/12.2595201
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KEYWORDS
Tolerancing
Resonators
Optical spheres
Optical fibers
Resonance enhancement
Spherical lenses
Standards development
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