title: Low-noise wideband ultrasound detection using polymer microring resonators.
abstract: 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.
authors.forename: Sheng-Wen
authors.initials: SW
authors.lastname: Huang
authors.forename: Sung-Liang
authors.initials: SL
authors.lastname: Chen
authors.forename: Tao
authors.initials: T
authors.lastname: Ling
authors.forename: Adam
authors.initials: A
authors.lastname: Maxwell
authors.forename: Matthew
authors.initials: M
authors.lastname: O'Donnell
authors.forename: L Jay
authors.initials: LJ
authors.lastname: Guo
authors.forename: Shai
authors.initials: S
authors.lastname: Ashkenazi