Results 181 to 190 of about 84,612 (251)

Effects of femtosecond laser micromachining on the surface and substrate properties of poly-lactic acid (PLA)

, 2021
The effects of femtosecond laser ablation on the surface morphology, surface chemical composition, and matrix properties of poly-lactic acid (PLA) were explored in this paper, since the analysis of the different energy density range is crucial in ...
Guangchao Ye, Wei Wang, D. Fan, P. He
semanticscholar   +1 more source

Automated and remote synthesis of poly(ethylene glycol)-mineralized ZIF-8 composite particles via a synthesizer assisted by femtosecond laser micromachining

Chinese Chemical Letters, 2021
Mineralization of the ZIF-8 in the presence of biomacromolecules has been demonstrated to be a general way for making bioentities@ZIFs composites. The ZIF-8 crystals permit controlled storage and utilization of the bioentities, thus can benefit drug ...
Miao Wu, Lingling Xia, Yucen Li, Difeng Yin, Jianping Yu, Wenbo Li, Ning Wang, Xin Li, J. Cui, W. Chu, Ya Cheng, Ming Hu   +11 more
semanticscholar   +1 more source

Femtosecond laser micromachining of silicon

ICALEO 2001: Proceedings of the Laser Materials Processing Conference and Laser Microfabrication Conference, 2001
Results are presented for micromachining of single crystal (<100> orientation) of silicon using a femtosecond Ti:Sapphire laser from Spectra Physics of 2mJ energy, 100 fs pulse width, 10 kHz repetition rate and wavelength of 790 nm. Some of the results include: measurements of femtosecond laser characteristics, effect of beam focus ...
M. El-Bandrawy, Mool C. Gupta
openaire   +1 more source

Introduction to micromachining with femtosecond laser pulses

ICALEO 2002: 21st International Congress on Laser Materials Processing and Laser Microfabrication, 2002
Micromachining with lasers is an evolving technology. Initially laser micromachining was based on continuous-wave or long-pulse lasers. However, these lasers, transferred heat to the work piece, introducing limitations in the precision and quality of the machining process.
Philippe Bado, Ali Said, William Clark
openaire   +1 more source

Femtosecond laser micromachining study in CVD diamond

Latin America Optics and Photonics (LAOP) Conference 2022, 2022
Diamond is a highly sought after material for photonic applications. In this work, the incubation effect was studied at 1030 nm, which could improve the fs-laser micromachining processing technique in such material.
Lucas Konaka Nolasco, Cleber Renato Mendonça   +1 more
openaire   +1 more source

Femtosecond laser system for micromachining of the materials

SPIE Proceedings, 2015
Femtosecond–pulse laser micromachining is based on a laser ablation phenomenon, i.e. total evaporation of material from the target surface during laser irradiation. It is the most precise method of material removal. Moreover it does not require any post processing.
R. Barbucha, M. Kocik, M. Tański, K. Garasz, T. Petrov, C. Radzewicz   +5 more
openaire   +1 more source

Characterization of nanoscale structures observed in femtosecond laser micromachining [PDF]

2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006
We present a quantitative analysis of self-arranged sub-wavelength structures created by femtosecond laser micromachining in silica. From the spatial correlation we calculate the periods of the structures versus laser energy and wavelength, and translation speed.
Bricchi, Erica, Yang, Weijia, Horak, Peter, Corbari, Costantino, Kazansky, Peter G.   +4 more
openaire   +1 more source

Femtosecond Laser Micromachining

2013
Ultrashort laser pulses with durations in the femtosecond range up to a few picoseconds provide a unique method for the structuring of practically all materials with high precision and minimal thermal and mechanical influence of the surrounding. Due to the high intensities obtained in the focal volume even at moderate pulse energies not only surface ...
Loren Cerami, Eric Mazur, Stefan Nolte, Chris B. Schaffer   +3 more
openaire   +1 more source

Femtosecond Laser Micromachining of a-Si:H

2014
Femtosecond laser micromachining has been used to write bulk waveguides and photonic devices in glasses, polymers, and crystalline silicon (Gattass and Mazur, Nat Photonics 2:219–225, 2008). Refractive index changes in these materials tend to be less than a percent, which sets limitations on applications due to low light confinement.
Michael Moebius, E. Mazur
openaire   +1 more source

Femtosecond laser micromachining and biological therapy

Laser Physics, 2008
Nonlinear micromachining with femtosecond laser pulses has attracted much attention in microphotonics and biophotonics. In this paper, we demonstrate the fabrication of optical elements in bulk transparent materials, direct welding between transparent substrates, and subcellular ablation in living cells by focusing femtosecond laser pulses.
W. Watanabe, T. Tamaki, K. Itoh
openaire   +1 more source