1.Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
2.Department of Physics, Zhejiang University, Hangzhou 310028, China
3.National Laboratory on High Power Laser and Physics, Shanghai 201800, China
4.Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
5.Department of Bioengineering, University of Illinois at UrbanaChampaign, Champaign, IL 61801, USA
6.Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Champaign, IL 61801, USA
7.Department of Electrical & Computer Engineering, Boston University, Boston, MA 02215, USA
8.Photonics Center, Boston University, Boston, MA 02215, USA
Gabriel Popescu (gpopescu@illinois.edu)
Ji-Xin Cheng (jxcheng@bu.edu)
纸质出版日期:2019,
网络出版日期:2019-12-11,
收稿日期:2019-07-25,
修回日期:2019-11-07,
录用日期:2019-11-18
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Bond-selective transient phase imaging via sensing of the infrared photothermal effect[J]. LSA, 2019,8(6):1126-1137.
Zhang, D. et al. Bond-selective transient phase imaging via sensing of the infrared photothermal effect. Light: Science & Applications, 8, 1126-1137 (2019).
Bond-selective transient phase imaging via sensing of the infrared photothermal effect[J]. LSA, 2019,8(6):1126-1137. DOI: 10.1038/s41377-019-0224-0.
Zhang, D. et al. Bond-selective transient phase imaging via sensing of the infrared photothermal effect. Light: Science & Applications, 8, 1126-1137 (2019). DOI: 10.1038/s41377-019-0224-0.
Phase-contrast microscopy converts the phase shift of light passing through a transparent specimen
e.g.
a biological cell
into brightness variations in an image. This ability to observe structures without destructive fixation or staining has been widely utilized for applications in materials and life sciences. Despite these advantages
phase-contrast microscopy lacks the ability to reveal molecular information. To address this gap
we developed a bond-selective transient phase (BSTP) imaging technique that excites molecular vibrations by infrared light
resulting in a transient change in phase shift that can be detected by a diffraction phase microscope. By developing a time-gated pump-probe camera system
we demonstrate BSTP imaging of live cells at a 50 Hz frame rate with high spectral fidelity
sub-microsecond temporal resolution
and sub-micron spatial resolution. Our approach paves a new way for spectroscopic imaging investigation in biology and materials science.
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