Vibrational dephasing time imaging by time-resolved broadband coherent anti-Stokes Raman scattering microscopy

被引:36
|
作者
Lee, Young Jong [1 ]
Cicerone, Marcus T. [1 ]
机构
[1] Natl Inst Stand & Technol, Div Polymers, Gaithersburg, MD 20899 USA
基金
美国国家卫生研究院;
关键词
D O I
10.1063/1.2838750
中图分类号
O59 [应用物理学];
学科分类号
摘要
Time delay control in broadband coherent anti-Stokes Raman scattering (CARS) allows acquisition of time-resolved CARS images free of nonresonant background (NRB). We demonstrate that, in some cases, CARS image contrast is not chemical contrast but simply due to differences in NRB. Time-resolved CARS is used to rectify this by eliminating the NRB. We also construct a vibrational dephasing time image from a sequence of time-resolved CARS images of polystyrene beads in toluene. In doing so, we demonstrate the potential of imaging local molecular interactions between molecules and their surrounding in a structured medium.
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页数:3
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