Publish Date: 01.12.2022

Category: News from the University

The demand for high amplitude and high-frequency ultrasound to achieve high spatial resolution imaging or ablate a target located deep into the bio-tissue has created new challenges and the development of a new class of functional materials, defined as photoacoustic or ‘’piezophotonic’’. Although high-frequency ultrasounds based on a traditional piezoelectric transducer are commonly used, the propagating distance of the wave represents a limiting factor due to the strong attenuation in water and in biological tissue. Moreover, their miniaturization in the MHz frequency range can be a challenging and expensive task. A photoacoustic approach, employing pulsed optical excitation of photoacoustic materials results in ultrasound pulses with high amplitudes as well as high frequency. This minimizes the electrical components and cabling usually used and creates new opportunities.

Read more in our Research News.