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Resonant-Opto-Thermomechanical Oscillator (ROTMO): A Low-Power, Large Displacement, High-Frequency Optically Driven
1Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroska cesta 46, Maribor, SI-2000, Slovenia.
Small (Weinheim an Der Bergstrasse, Germany)
|July 23, 2022
Summary
This study introduces a novel light-driven micromechanical oscillator. It achieves large displacements and high frequencies using low optical power, paving the way for new micro-opto-mechanical systems.
Area of Science:
- Opto-mechanics
- Microsystems engineering
- Photonics
Background:
- Micromechanical oscillators are crucial components in various microdevices.
- Existing actuation methods often require significant power or complex fabrication.
- There is a need for efficient, low-power actuation methods for micro-optomechanical systems.
Purpose of the Study:
- To present a novel, light-driven micromechanical oscillator.
- To demonstrate actuation using low optical power and achieving large mechanical displacements.
- To explore the potential for high-frequency operation in such devices.
Main Methods:
- Fabrication of an asymmetrically metal-coated optical microwire.
- Configuration into a silica micromechanical oscillator.
- Actuation via light absorption, thermal expansion, and resonant amplification.
Main Results:
- The oscillator operates with low optical power (mW or µW range).
- Achieved large mechanical displacements (5-100 µm).
- Demonstrated tunable frequencies from sub-kHz to over 200 kHz.
Conclusions:
- The developed optically driven micromechanical oscillator offers efficient, large-displacement actuation.
- This technology provides a foundation for new actuated micro-opto-mechanical systems.
- The design enables high-frequency operation with minimal optical power input.
