Author Affiliations

Ting-Wei Hsu,^1,* Tobias Thiele,¹ Wenqi Zhu,³ Mark. O. Brown,¹ Scott B. Papp,² Amit Agrawal,³ and Cindy A. Regal¹

¹JILA, National Institute of Standards and Technology and University of Colorado, and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

²Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO 80305 USA

³National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA

^*Corresponding author: Tingwei.hsu@colorado.edu