Efficient Excitation of Micro/Nano Resonators and Their Higher Order Modes

Area of Science:

• Physics
• Electrical Engineering
• Materials Science

Background:

• Micro/nano-electromechanical systems (MEMS/NEMS) resonators are crucial for various sensing and electronic applications.
• Efficiently actuating MEMS/NEMS resonators at their fundamental and higher-order modes is essential for device performance.
• Existing actuation methods can be complex or limited in their excitation capabilities.

Purpose of the Study:

• To develop a simple and flexible technique for efficient MEMS/NEMS resonator actuation.
• To demonstrate the excitation of fundamental and higher-order vibration modes.
• To achieve significant amplitude amplification for resonator activation.

Main Methods:

• Utilizing an LC tank resonant circuit to generate amplified voltage.
• Matching the electrical resonance frequency of the LC circuit with the mechanical resonance of the MEMS/NEMS resonator.
• Employing the amplified voltage across the inductor (L) to actuate the resonator.

Main Results:

• Demonstrated amplitude amplification up to twelve times.
• Successfully excited multiple vibration modes of a microplate MEMS resonator.
• Efficiently excited the fundamental mode of a nano-electromechanical systems (NEMS) resonator.

Conclusions:

• The proposed LC circuit-based method provides an efficient and versatile approach for MEMS/NEMS resonator actuation.
• Significant amplitude amplification is achievable by matching electrical and mechanical resonances.
• This technique effectively excites various vibration modes, enhancing the utility of MEMS/NEMS devices.