Phase-sensitive OCT imaging of multiple nanoparticle species using spectrally multiplexed single pulse photothermal excitation.
We apply phase-sensitive optical coherence tomography to image multiple nanoparticle species with two excitation wavelengths matched to their distinct absorption peaks. Using different modulation frequencies, multiple species collocated within the sample can be distinguished. In addition, we characterize single-pulse excitation schemes as a method to minimize bulk heating of the sample. We demonstrate this new scheme with B-mode photothermal measurements of tissue phantoms.
Department of Biomedical Engineering, Duke University, Durham, NC 27708,  USA.
Sanghoon
S
Kim
Matthew T
MT
Rinehart
Hansang
H
Park
Yizheng
Y
Zhu
Adam
A
Wax