Laser transfer of thin mesotetraphenylporphyrin layers

The technique of forming mesotetraphenylporphyrin microstructures on the quartz substrate surface by laser-induced forward transfer from a target was developed. The target was a transparent substrate with a thin titanium coating onto which five mesotetraphenylporphyrin layers were deposited by the Langmuir-Schaefer method. The target was irradiated with single 500-ps pulses through a transparent substrate, which causes nondestructive thermal deformation of a metal film, resulting in efficient porphyrin emission from the target. The effect of the titanium film thickness and the laser emission wavelength on the transfer process was studied. An analysis of the optical absorption and fluorescence spectra of obtained surface microstructures suggests that the material structure is retained during laser transfer.