Experimental demonstration of microfabricated phononic crystal resonators based on two-dimensional silicon plate

Nan Wang, J. M. Tsai, B. W. Soon, Dim Lee Kwong, Fu Li Hsiao, Moorthi Palaniapan, Chengkuo Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper shows the design, fabrication and characterization of a novel design micromechanical resonators with Bloch-mode resonance by creating defects on a two-dimensional (2-D) silicon phononic crystal (PnC) slab made by etching a square array of cylindrical air holes in a 10m thick free-standing silicon plate. Piezoelectric aluminum nitride (AlN) film is deployed as the inter-digital transducers (IDT) to transmit and detect acoustic waves, thus making the whole microfabrication process CMOS-compatible. We also fabricate a PnC structure which has a stopband of 140MHz < f <195MHz which agrees quite well with the simulation results. The characterized resonant frequency of microfabricated PnC resonators increases with central-hole radius (r') and reaches its maximum value (163.54MHz) at r'=8μm, while Q factor reaches maximum (954) at r'=6μm. The Bloch-mode PnC resonators based on square lattice PnC structure show promising acoustic resonance characteristics with relative smaller PnC active area than other reported designs. Such performance is very promising for sensing applications.

Original languageEnglish
Title of host publication2011 Defense Science Research Conference and Expo, DSR 2011
DOIs
Publication statusPublished - 2011 Oct 13
Event2011 Defense Science Research Conference and Expo, DSR 2011 - Singapore, Singapore
Duration: 2011 Aug 32011 Aug 5

Publication series

Name2011 Defense Science Research Conference and Expo, DSR 2011

Other

Other2011 Defense Science Research Conference and Expo, DSR 2011
CountrySingapore
CitySingapore
Period11-08-0311-08-05

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All Science Journal Classification (ASJC) codes

  • Law

Cite this

Wang, N., Tsai, J. M., Soon, B. W., Kwong, D. L., Hsiao, F. L., Palaniapan, M., & Lee, C. (2011). Experimental demonstration of microfabricated phononic crystal resonators based on two-dimensional silicon plate. In 2011 Defense Science Research Conference and Expo, DSR 2011 [6026876] (2011 Defense Science Research Conference and Expo, DSR 2011). https://doi.org/10.1109/DSR.2011.6026876