Dresden 2006 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.42: Poster

Donnerstag, 30. März 2006, 16:00–18:00, P1

Highly Efficient Laser Driving Mechanism for a Nano-Electromechanical Beam Resonator — •Daniel König and Jörg Kotthaus — LMU, Department für Physik, LS Prof. Kotthaus, Geschwister-Scholl-Platz 1, 80539 München

The relevance of nanoelectromechanical systems (NEMS) range from their applications as highly sensitive detectors, ultra small switches, and spin detectors to fundamental research [1,2,3]. As NEMS are continuously scaled down, they are starting to approach the quantum mechanical limit [4]. It is of particular interest to find efficient and reliable driving mechanisms of NEMS. Here we present an actuation mechanism, which relies upon the thermal induced deflection of a bi-metal strip after a laser excitation. The resonator is a bi-layer silicon-gold-system with the dimensions 10 mm, 200 nm, and 200 nm (length, width, height). The resonator is easily driven into the non-linear regime, where amplitudes up to 50 nm are reached at frequencies in the MHz range. For detecting the resonators response, the resonator is placed in a magnetic field of 12 Tesla at 4 Kelvin and the induced current due to its mechanical motion is measured with a lock-in technique.

[1] Ilic, Craighead et al., APL Vol 85, 13 (2004)

[2] J. E. Jang, S. N. Cha et al, APL 87, 163115 (2005)

[3] Rugar et al., Nature, Vol 430, 329 (2004)

[4] M. D. LaHaye et al., Science 304,74 (2004)