The researchers reported the development of the smallest ultrasound detector today, which allows to achieve visualization of ultra-high resolution.
Since the beginning of the use of medical ultrasound visualization in the 1950s, the technology was based on the use of piezoelectric detectors, converting pressure to the electric voltage. The resolution of the image of fabrics and materials depends on their size, but with their significant decrease, their sensitivity is reduced, which does not allow to increase their effectiveness.
A team of scientists from the Munich Technical University and the German Research Center for Environmental Hygiene created a silicon waveguide-reference detector from miniature photon schemes, tracking changes in the intensity of light. Its size is about half of the micron, which is 10 thousand times less than the smallest piezoelectric detector and 200 times less than the length of the ultrasound wave. This allows you to visualize the details of less than one micrometer.
Small size makes detectors not only efficient, but also cheap, and also allows them to integrate them into portable devices and use to study the fundamental properties of ultrasonic waves.
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