Author Affiliations

Xiyuan Lu,^1,2 Gregory Moille,^1,2 Anshuman Singh,^1,2 Qing Li,^1,3 Daron Westly,¹ Ashutosh Rao,^1,2 Su-Peng Yu,^4,5 Travis C. Briles,^4,5 Tara Drake,^4,5 Scott B. Papp,^4,5 and Kartik Srinivasan^1,6

¹Microsystems and Nanotechnology Division, NIST, Gaithersburg, MD 20899, USA

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

³Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA

⁴Time and Frequency Division, NIST, Boulder, CO 80305, USA

⁵Department of Physics, University of Colorado, Boulder, Colorado, 80309, USA

⁶Joint Quantum Institute, NIST/University of Maryland, College Park, Maryland 20742, USA