High-density regular arrays of nanometer-scale rods formed on silicon surfaces via femtosecond laser irradiation in water

Citation:

M. Shen, J. E. Carey, C. H. Crouch, M. Kandyla, H.A. Stone, and E. Mazur. 2008. “High-density regular arrays of nanometer-scale rods formed on silicon surfaces via femtosecond laser irradiation in water.” Nano Leters, 8, Pp. 2087–2091. Publisher's Version

Abstract:

We report on the formation of high-density regular arrays of nanometer-scale rods using femtosecond laser irradiation of a silicon surface immersed in water. The resulting surface exhibits both micrometer-scale and nanometer-scale structures. The micrometer-scale structure consists of spikes of 5-10 µm width, which are entirely covered by nanometer-scale rods that are roughly 50 nm wide and that protrude perpendicularly from the micrometer-scale spikes. The formation of the nanometer-scale rods involves several processes: refraction of laser light in highly excited silicon, interference of scattered and refracted light, rapid cooling in water, and capillary instabilities.
Last updated on 07/24/2019