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The study aims to evaluate how high-frequency, high-intensity ultrasound affects the refractive index in water.

Static refractive index change induced by high-frequency, high-intensity ultrasound

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The study aims to evaluate how high-frequency, high-intensity ultrasound affects the refractive index in water.
Used high-frequency ultrasound (160 MHz) to induce refractive changes in water.
Employed optical methods like fiber-optic sensors and Schlieren photography for analysis.
Utilized simulation models based on experimental data to predict laser beam propagation.
The refractive index of water shifted towards that of air with a significant gradient observed.
Cavitation bubbles were generated in water and analyzed, contributing to refractive index changes.
Experimental data supported predictions of laser path alterations due to these gradients.

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Randomized trial shows refractive index change in water, suggesting potential for optical devices.

Daisuke Koyama (2025) studied this question.

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