Fig. 11.

Principles and results of the preservation of heating memory. (A) Pulse sequence pattern, including two pulsed laser excitations and one CW excitation for each measurement [108]. The wavelength of the CW laser is denoted as ${\lambda }_i$, where the subscript i denotes the different wavelengths applied to the heating process. (B)PA signals before and after CW laser heating [108]. (C) Principle of ULM-PAM, including two UV pulses and an MIR pulse [110]. (D) The corresponding PA signals of three pulses in ULM-PAM [110]. Lipid images produced using (E) ULM-PAM and (F) MIR-PAM. Protein images produced using (G) ULM-PAM and (H) MIR-PAM. Figures reproduced with publisher’s permission [108,110].