1. Institut FEMTO-ST, Université de Franche-Comté and CNRS, 15 B avenue des Montboucons, F-25030 Besançon Cedex, France
2. Georgia Institute of Technology, UMI Georgia Tech – CNRS, George W. Woodruff School of Mechanical Engineering, Georgia Tech Lorraine, 2 rue Marconi, 57070 Metz-Technopole, France