Enhanced optical absorptance of metals using interferometric femtosecond ablation

Ablation of solids by femtosecond lasers: Ablation mechanism and ablation thresholds for metals and dielectrics

Interferometric measurements of femtosecond group delay in optical components.

We report direct measurements of the frequency dependence of the optical group delay for a number of optical components commonly used in femtosecond optics. We have investigated the group-delay errors that occur on reflection from metal and dielectric mirrors under various conditions and passage through devices that introduce angular dispersion. We obtain measurement accuracy of about ±1 fsec o...

Gold-silicon nanofiber synthesized by femtosecond laser radiation for enhanced light absorptance

UNLABELLED In this study, we devised a new concept for the precise nanofabrication of Au-Si fibrous nanostructures using megahertz femtosecond laser irradiation in air and atmospheric pressure conditions. The weblike fibrous nanostructures of Au thin layer on silicon substrate, which are proposed for the application of solar cells, exhibit a specific improvement of the optical properties in vis...

Ablation characteristics of Au, Ag, and Cu metals using a femtosecond Ti:sapphire laser

Femtosecond laser ablation of metallic bulk crystals of Au, Ag and Cu was experimentally studied with laser pulse widths ranging from 120 fs through 800 fs at a center wavelength of 780 nm for micro-machining applications. Two different ablation regimes were found in terms of the laser fluence. The characteristic length of different ablation regimes was explained in terms of the optical skin de...

Laser Ablation of Metals

Laser ablation is the process of removing material with very intensive, pulsed laser radiation. It is a technology which gains increasingly greater importance for drilling, eroding, welding, structuring and marking of all kinds of materials. With the advent of ultrashort picoand femtosecond pulses especially, a large number of new processing methods were developed. A deeper understanding of the...