Regensburg 2007 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 20: Poster session
MM 20.34: Poster
Dienstag, 27. März 2007, 14:45–18:00, Poster C
Spatiotemporal stroboscopic interferometry on nanomechanical resonators — •Fabian Giesen1,2, Miroslav Belov3, Joseph Losby1, Jennifer Moroz1, Alastair Frasier1, Graham McKinnon3, Yuebin Ning3, and Mark R. Freeman3,4 — 1Department of Physics, University of Alberta, Edmonton, Canada T6G 2G7 — 2Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Str. 2A, 12489 Berlin — 3Norcada Inc., 4465 - 99 street, Edmonton, Canada T6E 5B6 — 4National Institute for Nanotechnology, Edmonton, Canada T6G 2M9
Despite the fundamental and application oriented interest of nanomechanical structures, the detection of their motion remains a challenge. We present spatiotemporal interferometric detection of the motion of microstructured cantilevers and doubly-clamped beams. This technique is capable of broadband detection with picosecond time resolution and micrometre spatial resolution. The actuation is achieved through fast voltage pulses triggered by a pump laser pulse. The subsequent motion is detected through the interferometric contrast of a probe laser spot reflected from the vibrating structure and the sustrate. We discuss the calibration of the interferometric contrast to obtain absolute values of the vibration of our silicon based nanostructures. We also demonstrate the capability of imaging the out-of-plane flexural modes of our cantilevers. Our work was supported by iCore, CIAR, and NSERC