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Cross patterning on MgO based on dislocations using femtosecond laser irradiation

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Abstract

We show a unique technique to form dense dislocations locally inside a MgO single crystal with a rock-salt type structure using femtosecond (fs) laser irradiation. Cross-shaped patterns of micrometer size, originating from densely introduced dislocations, are formed spontaneously around the focal point. We controlled the three-dimensional propagation of the dislocations by adjusting the pulse energy of the fs laser and NA of objective lens. The technique may open up a new field of dislocation technology for optical applications.

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Correspondence to Shingo Kanehira.

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Kanehira, S., Miura, K., Hirao, K. et al. Cross patterning on MgO based on dislocations using femtosecond laser irradiation. Appl. Phys. A 92, 913–916 (2008). https://doi.org/10.1007/s00339-008-4561-8

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  • DOI: https://doi.org/10.1007/s00339-008-4561-8

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