Low-noise wideband ultrasound detection using polymer microring resonators.
Polymer microring resonators for low-noise, wideband ultrasound detection are presented. Using a nanoimprinting technique, we fabricated polymer microring resonators with a quality factor of 6000 resulting in high sensitivity to ultrasound. A noise-equivalent pressure of 0.23 kPa over 1-75 MHz and a detection bandwidth of over 90 MHz at -3 dB were measured. These results demonstrate the potential of polymer microring resonators for high-frequency ultrasound and photoacoustic imaging. For a typical photoacoustic imaging test case, the high sensitivity demonstrated in these devices would increase imaging depth by a factor of 3 compared to state-of-the-art polyvinylidene fluoride detectors.
Huang
Sheng-Wen
SW
Chen
Sung-Liang
SL
Ling
Tao
T
Maxwell
Adam
A
O'Donnell
Matthew
M
Guo
L Jay
LJ
Ashkenazi
Shai
S