James McKelvy, Jet Propulsion Laboratory, California Institute of Technology, United States; Irina Novikova, Eugeniy Mikhailov, Mario Maldonado, Department of Physics, College of William & Mary, United States; Isaac Fan, Yang Li, Ying-Ju Wang, John Kitching, National Institute of Standards and Technology, United States; Andrey Matsko, Jet Propulsion Laboratory, California Institute of Technology, United States