Experimental study demonstrates laser-controlled phase transitions in sapphire, suggesting a method for high-resolution 3D microfabrication via selective chemical etching.
Amorphous regions in sapphire with sub-micrometer 3D resolution have been produced at the focus of a single femtosecond laser pulse. Crystalline- to-amorphous and amorphous-to-polycrystalline transitions (crystalline and amorphous regions are marked C and A in the HRTEM image) are induced by single- and multi-pulse irradiation, respectively. The wet-etching selectivity for the amorphous phase is significantly greater than that for the crystalline phase in aqueous HF.
No takes yet. Share an insight, caveat, or question.
Juodkazis et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: