A useful method was demonstrated to investigate 532 nm laser energy threshold to carbonize various compounds including sumanene derivatives through in situ observation utilizing a micro-Raman spectrometer. It was revealed that the thresholds of sumanene derivatives are lower than those of the planar partial structures of sumanene derivatives. Moreover, [6,6]-phenyl-C₆₁-butyric acid methyl ester (PCBM) shows a considerably lower threshold than the sumanene derivatives utilizing this method. This work can be expected to contribute toward the evolution of laser-induced carbonization-based chemistry.