Electrothermal noise analysis in frequency tuning of nanoresonators

Electrothermal tuning mechanisms for nanoelectromechanical resonators are demonstrated. Voltages induced by oscillation of Al/SiC nanoresonators around 10 MHz in a moderate magnetic field are measured using a room-temperature tabletop setup in moderate vacuum. The dynamic range as well as the resonance frequency of the resonator can be reversibly controlled by electrothermal tuning using DC voltage. This paper presents experimental results that demonstrates the effect of the resonance frequency, Q factor and dynamic range during the electrothermal tuning process. As the input DC power increases, Q factor decreases due to the decrease in the resonance frequency, and SNR decreases due to the reduced amplitude and increased noise. This can be explained by thermal relaxation of the resonator structure during the tuning process, and Johnson noise and eddy current effects associated with the magnetomotive transduction.

[1]  M. Roukes,et al.  Ultrasensitive nanoelectromechanical mass detection , 2004, cond-mat/0402528.

[2]  Miko Elwenspoek,et al.  Nonlinearity and Hysteresis of Resonant Strain Gauges , 1998 .

[3]  F. Ayazi,et al.  An analytical model for support loss in micromachined beam resonators with in-plane flexural vibrations , 2003 .

[4]  John A. Judge,et al.  Attachment losses of high Q oscillators , 2004 .

[5]  M. Mehregany,et al.  Evaluation of 3C-SiC nanomechanical resonators using room temperature magnetomotive transduction , 2005, IEEE Sensors, 2005..

[6]  M. Roukes,et al.  VHF, UHF and microwave frequency nanomechanical resonators , 2005 .

[7]  Michael L. Roukes,et al.  Intrinsic dissipation in high-frequency micromechanical resonators , 2002 .

[8]  James Hone,et al.  Electrothermal tuning of Al–SiC nanomechanical resonators , 2006 .

[9]  K. Schwab,et al.  Spring constant and damping constant tuning of nanomechanical resonators using a single-electron transistor , 2002 .

[10]  Panos G. Datskos,et al.  Femtogram mass detection using photothermally actuated nanomechanical resonators , 2003 .

[11]  Michael L. Roukes,et al.  Tuning nonlinearity, dynamic range, and frequency of nanomechanical resonators , 2006 .

[12]  James Hone,et al.  Nanomechanical hydrogen sensing , 2005 .

[13]  M. Roukes,et al.  Thermoelastic damping in micro- and nanomechanical systems , 1999, cond-mat/9909271.

[14]  Michael L. Roukes,et al.  Dynamic range of nanotube- and nanowire-based electromechanical systems , 2005 .

[15]  Kiyoshi Itao,et al.  Energy loss of a cantilever vibrator , 1968 .

[16]  Harold G. Craighead,et al.  Virus detection using nanoelectromechanical devices , 2004 .

[17]  H. Craighead,et al.  Attogram detection using nanoelectromechanical oscillators , 2004 .