Controlling the nonlinearity of silicon nanowire resonators using active feedback

Applied Physics Letters

Volumn 95, Issue 12, 2009, Pages

  Nichol, John M ^a   Hemesath, Eric R ^b   Lauhon, Lincoln J ^b   Budakian, Raffi ^a  

^a University of Illinois at Urbana Champaign   (United States)

^b Northwestern University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACTIVE FEEDBACK; CUBIC NONLINEARITIES; DYNAMIC RANGE; NON-LINEARITY; NONLINEAR FEEDBACK; SILICON NANOWIRES;

MICROWAVE AMPLIFIERS; PARAMETRIC AMPLIFIERS; RESONATORS;

NANOWIRES;

EID: 70349659661     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.3232232     Document Type: Article

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20. 0 on the dc bias to determine the second derivative of the SiNW-electrode capacitance using the results from Ref. The calculated value is δ/ Vac =0.003 22, while the fitted value is δ/ Vac =0.002 01. The agreement seems reasonable given that we do not know the exact capacitance of the electrode.
21. The lower limit of the dynamic range is set by thermal fluctuations which are below the critical amplitude, even for the native case. Also, the peak gain is predicted to be independent of the nonlinearity for small amplitudes. Thus, the amplitudes Anative and Azero for which the gain drops by 1 dB are determined, and the dynamic range increase is calculated as 20 log (Azero / Anative).