Once ultrasonic wave strikes the μLight, the piezoelectric receiver starts generating electrical power and turns on the on-board LEDs.
The light from LEDs will activate the pre-delivered PS and initiate the PDT.
Easy insertion via a biopsy needle.
Song, S. H., A. Kim, and B. Ziaie. "Omnidirectional Ultrasonic Powering for Millimeter-Scale Implantable Devices." Biomedical Engineering, IEEE Transactions on 62.11 (2015): 2717-2723.
Zhou, Jiawei, Albert Kim, and Babak Ziaie. "An ultrasonically controlled power management system for implantable biomedical devices." Biomedical Circuits and Systems Conference (BioCAS), 2015 IEEE. IEEE, 2015.