Affiliation: | 1. National Institute of Standards and Technology (NIST), Gaithersburg, MD;2. Department of Physics, Georgetown University, Washington, DC;3. Department of Physics, National Taiwan University, Taipei, Taiwan;4. National Metrology Institute of Japan (NMIJ/AIST), Tsukuba, Ibaraki, Japan;5. Graduate Institute of Applied Physics, National Taiwan University, Taipei, Taiwan;6. Instituto Nacional de Tecnologia Industrial, San Martin, Buenos, Aires, Argentina |