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multilayer-resonators
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On dynamic pull-in instability of electrostatically actuated multilayer nanoresonators: A semi-analytical solution
, Article ZAMM Zeitschrift fur Angewandte Mathematik und Mechanik ; Volume 99, Issue 9 , 2019 ; 00442267 (ISSN) ; Sharif University of Technology
Wiley-VCH Verlag
2019
Abstract
Based on the nonlocal Euler–Bernoulli beam theory, a theoretical approach is developed to investigate the effects of small scale and intermolecular force on the dynamic pull-in behavior of electrostatically actuated nanoresonators. To this purpose, nanoresonators are modeled as multilayer beams with rectangular cross-sections and fixed-fixed and fixed-free end conditions which are embedded in an elastic medium containing Winkler and Pasternak elastic foundations. Also, the effects of nonlocal parameter, fringing field due to the finite width of beams, Casimir or van der Waals intermolecular forces, nonlinear term induced by mid-plane stretching and Winkler and Pasternak elastic foundations...
Micro-optoelectromechanical systems accelerometer based on intensity modulation using a one-dimensional photonic crystal
, Article Applied Optics ; Volume 55, Issue 32 , 2016 , Pages 8993-8999 ; 1559128X (ISSN) ; Abedi, K ; Jafari, K ; Gholamzadeh, R ; Sharif University of Technology
OSA - The Optical Society
Abstract
In this paper, we propose what we believe is a novel sensitive micro-optoelectromechanical systems (MOEMS) accelerometer based on intensity modulation by using a one-dimensional photonic crystal. The optical sensing system of the proposed structure includes an air-dielectric multilayer photonic bandgap material, a laser diode (LD) light source, a typical photodiode (1550 nm) and a set of integrated optical waveguides. The proposed sensor provides several advantages, such as a relatively wide measurement range, good linearity in the whole measurement range, integration capability, negligible cross-axis sensitivity, high reliability, and low air-damping coefficient, which results in a wider...