TY - GEN
T1 - Evaluation of optoacoustic conversion efficiency of light-absorbing films for optoacoustic transmitter applications
AU - Baac, Hyoung Won
AU - Ling, Tao
AU - Park, Hui Joon
AU - Guo, L. Jay
PY - 2011
Y1 - 2011
N2 - Light-absorbing films have been utilized as optoacoustic transmitters for all optical ultrasound transducers. For these thin-film transmitters, however, optoacoustic conversion efficiencies (OCEs) and the output pressures have not been evaluated over a broadband and high frequency range. Here, we characterized such optoacoustic performance with high precision by using optical microring ultrasound detectors (OMUDs) under a plane wave configuration. We obtained ultrasound pulses minimizing diffraction-induced signal distortion, while maintaining broadband spectral information up to 100 MHz owing to the detector wideband response. In order to find an efficient thermal transfer medium for optoacoustic generation, we compared the OCEs and the output pressures for various polymers. Finally, a 2-D gold nanostructure with the polymer layer was characterized over the broadband frequency range.
AB - Light-absorbing films have been utilized as optoacoustic transmitters for all optical ultrasound transducers. For these thin-film transmitters, however, optoacoustic conversion efficiencies (OCEs) and the output pressures have not been evaluated over a broadband and high frequency range. Here, we characterized such optoacoustic performance with high precision by using optical microring ultrasound detectors (OMUDs) under a plane wave configuration. We obtained ultrasound pulses minimizing diffraction-induced signal distortion, while maintaining broadband spectral information up to 100 MHz owing to the detector wideband response. In order to find an efficient thermal transfer medium for optoacoustic generation, we compared the OCEs and the output pressures for various polymers. Finally, a 2-D gold nanostructure with the polymer layer was characterized over the broadband frequency range.
KW - Broadband ultrasound
KW - High frequency ultrasound
KW - Optical microring resonator
KW - Optoacoustic conversion efficiency
KW - Optoacoustic generation
UR - https://www.scopus.com/pages/publications/79955493707
U2 - 10.1117/12.875743
DO - 10.1117/12.875743
M3 - Conference contribution
AN - SCOPUS:79955493707
SN - 9780819484369
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Photons Plus Ultrasound
T2 - Photons Plus Ultrasound: Imaging and Sensing 2011
Y2 - 23 January 2011 through 25 January 2011
ER -