1. Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
2. Institut für Physik, Carl von Ossietzky Universität, D-26111 Oldenburg, Germany
3. Thales Research and Technology France, 1, Avenue Augustin Fresnel, F-91767 Palaiseau, Cedex France
4. Laboratoire Charles Fabry, Institut d’Optique, CNRS, UMR 8501, Université Paris-Sud 11, 2, Avenue Augustin Fresnel, F-91127 Palaiseau, Cedex France