"Exploiting Nonlinearity and Coupling in Resonant Micro- and Nanosystems"
March 26 @ 3:00 PM - 4:00 PM - Birck Nanotechnology Center, Room 1001
Abstract: This presentation will detail recent work on two distinct classes of resonant microelectromechanical systems (MEMS) that are believed to offer significant potential in mass sensing and signal processing applications. The first part of the presentation will describe the ongoing development of a new resonant sensor architecture which facilitates the detection of multiple target analytes while utilizing only a single excitation signal and single measurement readout. This electrostatically-actuated, multi-degree-of-freedom microsystem exploits sequential energy localization in the linear frequency response of a shuttle mass to which several individual sensing elements (functionalized microbeams) are attached. The general features of the sensor architecture, pertinent design issues, and preliminary experimental results, which validate the sensor concept, will be presented. The second portion of the talk will detail the on-going development of electromechanical signal processing elements, including bandpass signal filters and parametric amplifiers, based on coupled and/or nonlinear micro- and nanoresonators. Simple models for these devices and recent experimental results which validate the merits of coupling and nonlinearity in practical application will be presented.
- Mari-Ellyn Brock