Measuring the Effect of Excitation Signal Parameters on the Acoustic Intensity of Ultrahigh Frequency Ultrasound

Ultrahigh frequency ultrasound (>60MHz) has been widely used to micromanipulation. However, no technology can measure the acoustic intensity field over 60MHz, resulting in no clear conclusion on the effect of the excitation signal on the acoustic intensity. We used an atomic force microscope microcantilever as a mechanical sensor to measure the acoustic radiation force (ARF) of the ultrahigh frequency ultrasound, and then obtained the effect of the changes of excitation signal on the intensity of the acoustic intensity field. We revealed that the voltage has a quadratic correlation with the acoustic intensity, the duty factor has a positive correlation with the acoustic intensity within a certain range. The relationship between the frequency of the carrier wave and the intensity is not clear. The method we proposed holds promise to be the prototype of the technology for measuring the acoustic intensity field of ultrahigh frequency ultrasound.