Femtosecond Laser-Induced Thermal Transport in Silicon with Liquid Cooling Bath.

ABSTRACT: Nanostructured regular patterns on silicon surface are made by using femtosecond laser irradiations. This is a novel method that can modify the surface morphology of any large material in an easy, fast, and low-cost way. We irradiate a solid surface with a 400-nm double frequency beam from an 800-nm femtosecond laser, while the solid surface is submerged in a liquid or exposed in air. From the study of multiple-pulses and single-pulse irradiations on silicon, we find the morphologies of nanospikes and capillary waves to follow the same distribution and periodicity. Thermal transport near the solid surface plays an important role in the formation of patterns; a simulation was done to fully understand the mechanism of the pattern formation in single pulse irradiation. The theoretical models

SUBMITTER: Kan Z 

PROVIDER: S-EPMC6651069 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature