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. Author manuscript; available in PMC: 2018 Nov 14.
Published in final edited form as: J Phys Chem B. 2015 Aug 10;119(33):10586–10596. doi: 10.1021/acs.jpcb.5b07078

Figure 1.

Figure 1.

2D SFG spectroscopy pulse sequence and beam geometry. Mid-IR probe and visible pulses are aligned in the same yz plane, while mid-IR pump pulses are displaced slightly along the x axis. All pulses are polarized along the z axis (p polarized).