Experiments and characterization of two photon polymerization using 1 kHz femtosecond laser system

Nitin Uppal; Panos S. Shiakolas

doi:10.1117/12.763715

6 February 2008 Experiments and characterization of two photon polymerization using 1 kHz femtosecond laser system

Nitin Uppal, Panos S. Shiakolas

Proceedings Volume 6883, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics; 688311 (2008) https://doi.org/10.1117/12.763715
Event: MOEMS-MEMS 2008 Micro and Nanofabrication, 2008, San Jose, California, United States

Abstract

Two Photon Polymerization (2PP) is a powerful technique for the fabrication of 2-D and 3-D microstructures by focusing ultrashort laser pulses inside a polymer resin mixture consisting of concentration of monomer and photo initiator. By scanning the focused laser beam in the bulk resin, a complex three dimensional pattern could be fabricated with micrometer resolution. This work presents the current state of our research towards fabricating microstructures using 2PP with a Ti:Sapphire femtosecond laser working at 800 nm wavelength and a pulse width of about 150 fs. The maximum pulse repetition rate of the laser system is 1 kHz, which is much smaller than the MHz systems normally used for the 2PP process. A mathematical model representing the polymerization process is presented. The governing partial differential equations for the process are solved numerically and the results are discussed. Characterization experiments are performed on commercially available acrylate monomer and photoinitiator to evaluate polymerization and damage threshold. In addition, the effects of self-focusing and self-trapping on the fabrication of microfeatures are presented.

Citation Download Citation

Nitin Uppal and Panos S. Shiakolas "Experiments and characterization of two photon polymerization using 1 kHz femtosecond laser system", Proc. SPIE 6883, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics, 688311 (6 February 2008); https://doi.org/10.1117/12.763715

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available