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Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
Published on: August 8, 2025
Ultrathin single crystal diamond nanomechanical dome resonators
Maxim K Zalalutdinov1, Matthew P Ray, Douglas M Photiadis
1U.S. Naval Research Laboratory, U.S. Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, D.C. 20375 United States. maxim.zalalutdinov@nrl.navy.mil
Nano Letters
|September 15, 2011
Summary
Researchers created the first nanomechanical resonators using single-crystal diamond. These ultra-thin diamond devices exhibit high quality factors, paving the way for advanced sensor applications.
Area of Science:
- Materials Science
- Nanotechnology
- Mechanical Engineering
Background:
- Nanomechanical resonators are crucial for sensing and signal processing.
- Fabricating high-performance resonators in novel materials presents significant challenges.
Purpose of the Study:
- To demonstrate the first nanomechanical resonators microfabricated in single-crystal diamond.
- To characterize their performance at radio frequencies and varying temperatures.
- To identify dissipation mechanisms and suggest improvements.
Main Methods:
- Microfabrication of shell-type resonators with thicknesses as low as 70 nm from single-crystal diamond.
- Radio frequency (RF) measurements of resonator quality factor (Q) from 50-600 MHz.
- Temperature-dependent measurements from 10 K to room temperature.
Main Results:
- Successfully fabricated the thinnest single-crystal diamond structures to date.
- Achieved high quality factors (Q ≈ 1000 at room temperature, Q ≈ 20,000 at 10 K).
- Observed quality factor dependence on temperature and frequency, indicating extrinsic dissipation.
Conclusions:
- Single-crystal diamond is a promising material for high-performance nanomechanical resonators.
- The dominant dissipation mechanism appears extrinsic, offering avenues for further performance enhancement.
- These resonators hold potential for applications in sensitive detection and RF technologies.
