[1] Institute for Microsystems,
[2] Interstate University of Applied Science Buchs (NTB),undefined
[3] CH-9471 Buchs SG,undefined
[4] Switzerland E-mail: dommann@ntb.ch,undefined
[5] Fraunhofer-Institut für Angewandte Festkörperphysik (IAF),undefined
[6] D-79108 Freiburg,undefined
[7] Germany,undefined
[8] BPS-NEXTRAL,undefined
[9] Grenoble,undefined
[10] F-38330 St. Ismier,undefined
[11] France,undefined