Author Affiliations

Wenqi Zhu,^1,2,* Lu Chen,^1,2 Junyeob Song,¹ Jinghui Yang,¹ Okan Koksal,^1,2 Zi Wang,^1,2 Andrew Ferdinand,^3,4 Sindhu Jammi,^3,4 Grisha Spektor,^3,4 Scott B. Papp,^3,4 and Amit Agrawal¹

¹Microsystems and Nanotechnology Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA

²University of Maryland, College Park, MD 20742, USA

³Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO 80305, USA

⁴Department of Physics, University of Colorado, Boulder, CO 80309, USA

^*Corresponding author: wenqi.zhu@nist.gov