Surface roughness influence on the quality factor of high frequency nanoresonators

TL;DR

This paper investigates how surface roughness affects the quality factor of high-frequency nanoresonators, emphasizing the importance of roughness wavelength and morphology in optimizing resonator performance.

Contribution

It demonstrates that surface roughness wavelength, characterized by the roughness exponent H, significantly impacts nanoresonator quality factors, highlighting the role of surface morphology in design.

Findings

Short wavelength roughness significantly affects quality factor.

Surface morphology influences resonator performance.

Long wavelength roughness parameters have lesser impact.

Abstract

Surface roughness influences significantly the quality factor of high frequency nanoresonators for large frequency - relaxation times within the non-Newtonian regime, where a purely elastic dynamics develops. It is shown that the influence of sort wavelength roughness, which is expressed by the roughness exponent H for the case of self-affine roughness, plays significant role in comparison with the effect of the long wavelength roughness parameters such as the rms roughness amplitude and the lateral roughness correlation length. Therefore, the surface morphology can play important role in designing high-frequency resonators operating within the non-Newtonian regime.