URL: https://www.researchgate.net/publication/349704083/figure/fig1/AS:996751238524929@1614655422856/Electromechanical-conversion-in-the-released-HBAR-device-a-Cross-section-of-the.png
URL2: https://www.researchgate.net/figure/Electromechanical-conversion-in-the-released-HBAR-device-a-Cross-section-of-the_fig1_349704083
