wgm  (Medicago)

Journal: Microsystems & Nanoengineering

Article Title: A novel gyroscope based on the slow surface acoustic wave in a phononic metamaterial

doi: 10.1038/s41378-024-00787-1

Figure Lengend Snippet: Structural and characteristic parameters of PM unit cells

Article Snippet: Coriolis mass at WGMs ( \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${m}_{Cori}$$\end{document} m C o r i ) , 1.56e −8 kg.

Techniques:

Journal: Microsystems & Nanoengineering

Article Title: A novel gyroscope based on the slow surface acoustic wave in a phononic metamaterial

doi: 10.1038/s41378-024-00787-1

Figure Lengend Snippet: a Basic structure for a unit cell of PM array. The mode shapes and their coupling vibration system are shown in the dashed frame, respectively. b Band structure of the hollow-pillar-based PM under rotation and non-rotation. The structural parameters are summarized in Table . The gray zone represents the sound cone, and the blue and orange dotted lines refer to the bands under rotation or not, respectively. WGMs bands are enlarged in the red frame. c Simulation model for calculating transmission characteristics. The displacement field are captured near but out of WGMs. d Transmission characteristics of the PM with 11-cell length under increasing rotation, calculated from the model in ( c ). e Trends of the frequency shifts under growing rotation. The blue solid line, red solid line and the black dashed line denote the results of 11-cell PM, 50-cell PM and theoretical prediction, respectively

Article Snippet: In fact, the WGMs are very similar to the wine-glass modes which could be coupled to each other under the Coriolis effect (even sometimes considered as the same mode ), and only the second-order WGMs are considered in this paper because they are usually more accessible to excite than the high-order WGMs.

Techniques: Transmission Assay

Journal: Microsystems & Nanoengineering

Article Title: A novel gyroscope based on the slow surface acoustic wave in a phononic metamaterial

doi: 10.1038/s41378-024-00787-1

Figure Lengend Snippet: Structural and characteristic parameters of PM unit cells

Article Snippet: In fact, the WGMs are very similar to the wine-glass modes which could be coupled to each other under the Coriolis effect (even sometimes considered as the same mode ), and only the second-order WGMs are considered in this paper because they are usually more accessible to excite than the high-order WGMs.

Techniques:

Journal: Microsystems & Nanoengineering

Article Title: A novel gyroscope based on the slow surface acoustic wave in a phononic metamaterial

doi: 10.1038/s41378-024-00787-1

Figure Lengend Snippet: a Displacement fields of the PM-patterned substrate (11-cell PM), indicating the wavelength of SAW within PM. Three cases are captured, displacement fields when operated frequency is before, inside and after the BG. And corresponding displacement fields on a blank substrate are considered as references. b Phase velocity of SAW within PM near WGMs band, calculated by continuously extracting data from a and substituting them into Eq. ). Gray region represents the BG of WGMs (region with less than half transmission). And the red dashed line indicates the phase velocity on blank substrate. c Phase velocity near WGMs band under increasing rotation. d Relationship between increasing rotation and the phase velocity of different operated frequencies

Article Snippet: In fact, the WGMs are very similar to the wine-glass modes which could be coupled to each other under the Coriolis effect (even sometimes considered as the same mode ), and only the second-order WGMs are considered in this paper because they are usually more accessible to excite than the high-order WGMs.

Techniques: Transmission Assay