A Compact High Frequency In-Air Ultrasound Assisted Disc Levitator: Simulations

We demonstrate the feasibility of a compact, high-frequency (>1 MHz) in-air levitator capable of supporting heavy masses (>100 mg) with enhanced trap stiffness and robust shock tolerance. Theoretical analysis highlights the benefits of operating at high frequency for increasing radiation force and acoustic spring constant. Finite element modeling is employed to determine an optimal architecture, examining the influence of transducer activation schemes, disc insertion, and slit geometries on the resulting trap field.