Femtosecond pulse laser-induced self-organized nanogratings on the surface of a ZnSe crystal |
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Authors: | HL Ma Y Guo MJ Zhong RX Li |
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Institution: | (1) Instrumental Analysis & Research Center, Shanghai University, Shanghai, 200444, P.R. China;(2) State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, P.R. China |
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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 |
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Keywords: | |
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