3D printing creates a frequency converter that converts a laser into a high-poly ultrasonic

Singapore Nanyang Technological University Laser-actuated-controlled ultrasonic frequency converter using 3D printing technology, which is a set of mirrors that convert laser light into high-intensity ultrasound using laser-controlled ultrasound for cell-scale microscopic objects With its meticulous operation, Nanda professor Claus-Dieter Ohl led the team to develop such drives for more accurate operation using 3D technology.

In the traditional converter of this type, the laser beam pulse is directed to a glass mirror assembly with a layer of carbon nanotube coating film. The heat from the laser beam can cause the coating to rapidly deform and cause the precise vibration to form an ultrasonic wave. However, the traditional glass mirror group can only be customized with a limited shape, which allows the ultrasound beam can only focus on a single point - just like the magnifying glass to focus the sun, so the application is very limited.

The European professor team used 3D printing technology to create a new polymer lens group, which can make the shape of the new lens group can be customized according to any requirement. In this way, laser-excited ultrasound can generate multiple focal points at the same time, or the ultrasound can be sequentially generated at different fixed points at different times. This greatly improves the controllability and flexibility, the ability to efficiently manipulate micro-objects, the polymer material is also much cheaper than glass. For example, the demonstration of the 2 cm3 concept prototype inverter costs only $ 2.

The research paper has been published in the recently published academic journal Applied Physics Communication and is expected to be used in fields such as microsurgery, material analysis, and fluid fine control of microfluidic components.

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