Towards Acoustic Radiation Free Lamb Wave Resonators for High-Resolution Gravimetric Biosensing

A novel Lamb wave resonator with fully suppressed acoustic radiation in water is proposed for high-resolution mass-sensitive detection of biomolecules. The elimination achieved by slowing down the to a velocity lower than sound speed water. This enables high-quality-factor resonance and reduces sensing frequency noise. High aspect ratio electrodes (HAREs) are used slow wave. elastic large surface area HAREs can also enhance mass sensitivity device. improved together low noise substantially improves overall resolution. Although reducing plate thickness wave, it makes device very fragile not practical use. In contrast, increasing electrode height allows use thick plates which robust. this article, behavior performance high (HARE-LWR) theoretically analyzed using finite element method simulations. Optimum design parameters were found through Reported results show that significant figure merit improvement was HARE-LWR design.