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SEM images showing structural features of the titanium sample with a groove period of . [(a) and (b)] The overview of the groove surface structure. (c) A magnified view of the ridge area. (d) A magnified view of the valley area.
Photographs of the titanium samples. (a) The sample with a groove period of . (b) The sample with a groove period of .
Spectral reflectance as a function of wavelength for the titanium sample with the groove period of . For comparison, reflectance of the polished sample before laser processing is also shown.
Terahertz absorptance of femtosecond laser-structured titanium.
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