New experimental research has observed up to 28 orders of parametric resonance, which has until now, only theoretically predicted.
The research publication co-authored by CSIC Co-Investigator, Dr Ashwin Seshia, PhD student Sijun Du and former CSIC Research Associate Dr Yu Jia, experimentally confirmed up to 28 orders of parametric resonance in a micromachined membrane resonator when electrically undamped.
The theory has long predicted conditions for the onset of n orders of parametric resonance in mechanical systems, previously reported experimental observations have been limited up to about the first 5 orders. This is due to the rapid narrowing nature of the frequency bandwidth of the higher instability intervals, making practical accessibility increasingly more difficult.
This work represents an important step towards constructing more efficient MEMS-scale energy harvesters with a potential for infrastructure sensing, miniaturised chip-scale battery-free sensors or wireless modules that could be fabricated in very large volumes.