Fig. 3: Characterization of the BSTP signal.
From: Bond-selective transient phase imaging via sensing of the infrared photothermal effect
a BSTP image of an oil film sample. There were six IR pulses with 6.67 µs intervals for each image. The IR wavelength was 2950 cm−1. b Temporal profile of the BSTP signal. c Spectral fidelity of the BSTP signal (squares) compared to the standard FTIR spectrum (line). d Pump power dependence. BSTP signals at different IR powers (squares) and the linear fitting curve (line). e Probe power dependence. BSTP signals with different probe powers (squares) and linear fits (line). f Signal-to-noise ratio of BSTP signal with different probe power (squares) and the fitted curve (line).
