, Volume 89, Issue 3, pp 707-709
Date: 26 Jun 2007

Femtosecond pulse laser-induced self-organized nanogratings on the surface of a ZnSe crystal

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Abstract

Periodic nanostructures are observed on the surface of ZnSe after irradiation by a focused beam of a femtosecond Ti:sapphire laser, which are aligned perpendicular to the laser polarization direction. The period of self-organized grating structures is about 160 nm. The phenomenon is interpreted in terms of interference between the incident light field and the surface scattered wave of 800-nm laser pulses. With the laser polarization parallel to the moving direction we produce long-range Bragg-like gratings by slowly moving the crystal under a fixed laser focus. The nanograting orientation is adjusted by laser polarization and the accumulation effect.

PACS

81.16.Rf; 78.67.-n; 33.80.Rv; 82.53.Mj; 81.16.-c