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. Author manuscript; available in PMC: 2019 Mar 20.
Published in final edited form as: J Phys Chem B. 2018 Sep 24;122(39):9218–9224. doi: 10.1021/acs.jpcb.8b07037

Figure 3. er-SRS microspectroscopy study for IR895.

Figure 3.

(a) Broad electronic background overwhelms vibrational features under 4-mW pump and 4-mW Stokes for 50 μM IR895 in methanol. (b-c) Electronic background study for IR895. Pump beam was set at 900 nm. (b) Unsymmetrical time delay dependence of the background. Laser power used were Ppump=4 mW and PStokes=4 mW. (c) Nonlinear pump beam laser power dependence of the background. PStokes=20 mW. (d) A small inverted peak is resolved from the electronic background using power combinations of Ppump=0.5 mW and PStokes=50 mW.