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Graphene-assisted electro-optomechanical integration on a silicon-on-insulator platform
Optics Express
|May 15, 2020
Summary
Researchers developed a novel graphene-based method for actuating micro- and nano-optomechanical devices. This approach avoids metal coatings, reducing mechanical losses and enabling high-performance sensing and signal processing.
Area of Science:
- Micro- and nano-optomechanics
- Solid-state physics
- Materials science
Background:
- Traditional actuation in micro- and nano-optomechanics often uses metals on non-piezoelectric materials like silicon.
- Metal coatings add weight and mechanical losses, hindering device performance.
- A need exists for improved actuation methods in optomechanical systems.
Purpose of the Study:
- To propose and demonstrate a new electro-optomechanical integration scheme.
- To utilize single-layer graphene for electromechanical actuation.
- To overcome limitations associated with metal coatings in optomechanical devices.
Main Methods:
- Fabrication of a silicon-on-insulator platform with patterned single-layer graphene.
- Electrical actuation of mechanical modes in a micromechanical resonator.
- Optical detection and characterization of mechanical motion.
Main Results:
- Successful electrical actuation and optical detection of mechanical modes.
- Achieved mechanical quality factors (Q) greater than 1000 in air.
- Demonstrated graphene's effectiveness as a conductive coating for actuation.
Conclusions:
- The proposed graphene-based scheme offers an effective alternative to metal coatings for electromechanical actuation.
- This approach is compatible with CMOS technology, facilitating large-scale integration.
- The technology holds promise for applications in high-speed sensing, communication, and signal processing.
