In-depth fiber optic two-photon polymerization and its applications in micromanipulation

Yogeshwar N. Mishra; Ninad D. Ingle; Mervyn Pinto; Samarendra K. Mohanty

doi:10.1117/12.875876

14 February 2011 In-depth fiber optic two-photon polymerization and its applications in micromanipulation

Yogeshwar N. Mishra, Ninad D. Ingle, Mervyn Pinto, Samarendra K. Mohanty

Proceedings Volume 7927, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics IV; 792718 (2011) https://doi.org/10.1117/12.875876
Event: SPIE MOEMS-MEMS, 2011, San Francisco, California, United States

Abstract

Two photon polymerization (TPP) has enabled three-dimensional microfabrication with sub-diffraction limited spatial resolution. However, depth at which TPP could be achieved, has been limited due to the high numerical aperture microscope objective, used to focus the ultrafast laser beam. Here, we report fiber-optic two photon polymerization (FTP) for in-depth fabrication of microstructures from a photopolymerizable resin. A cleaved single mode optical fiber coupled with tunable femtosecond laser could achieve TPP, forming extended waveguide on the fiber itself. The length of the FTP tip was found to depend on the laser power and exposure duration. Microfabricated fiber tip using FTP was employed to deliver continuous wave laser beam on to polystyrene microspheres in order to transport and manipulate selected particles by scattering force and 2D trapping. Such microstructures formed by TPP on tip of the fiber will also enable puncture and micro-surgery of cellular structures. With use of a cleaved fiber or axicon tip, FTP structures were fabricated on curved surfaces at large depth. The required Power for FTP and the polymerization rate was faster while using an axicon tip optical fiber. This enabled fabrication of complex octopus-like microstructures.

Citation Download Citation

Yogeshwar N. Mishra, Ninad D. Ingle, Mervyn Pinto, and Samarendra K. Mohanty "In-depth fiber optic two-photon polymerization and its applications in micromanipulation", Proc. SPIE 7927, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics IV, 792718 (14 February 2011); https://doi.org/10.1117/12.875876

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