1. School of Applied and Engineering Physics, Cornell University, 271 Clark Hall, Ithaca, New York 14853, United States
2. Laboratory of Atomic and Solid State Physics, Cornell University, 511 Clark Hall, Ithaca, New York 14853, United States
3. Kavli Institute at Cornell for Nanoscale Science, Cornell University, 420 Physical Sciences Building, Ithaca, New York 14853, United States
4. Robert J. Lang Origami, Alamo, California 94507, United States
5. Cornell Center for Materials Research, Cornell University, 627 Clark Hall, Ithaca, New York 14853, United States