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Development of both fundamental research and clinical applications of photoacoustic imaging call for ultrasound detectors of high sensitivity, flat frequency response, and compact size, which are not easily satisfied by traditional ultrasound detectors. Therefore, many alternative ultrasound detectors have been investigated in recent years and a representative one is the imprinted polymer microring...
A novel ultra-broad bandwidth ultrasound detector is demonstrated using imprinted polymer microring, with flat frequency response up to ∼350 MHz at −3dB. A record high sub-3µm axial resolution in ultrasound/photoacoustic imaging applications is demonstrated.
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