کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5369628 | 1388443 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Fabrication of grating structures by simultaneous multi-spot fs laser writing Fabrication of grating structures by simultaneous multi-spot fs laser writing](/preview/png/5369628.png)
Two-photon polymerisation is an established technique for the fabrication of three-dimensional microstructures. To date structures have mostly been developed using single beam serial writing. A novel approach to simultaneous multi-spot two-photon polymerisation, that uses a SiO2 on glass Fraunhofer diffractive optical element to generate an array of beamlets, is described. A Ti:sapphire laser, with wavelength 790Â nm, 80Â MHz repetition rate, 100Â fs pulse duration and an average power of 25Â mW, was used to initiate two-photon polymerisation. The DOE, in combination with a high power microscope objective, efficiently transforms the laser beam into a linear array of four spots of equal intensity. The fabrication of a periodic transmission grating, using parallel processing with these four spots, is shown. The grating was written in a Zr-loaded resin prepared on a glass substrate using dip coating deposition of a Zr/PMMA hybrid prepared by the sol-gel method. The operation of the diffractive element and the performance of the diffraction grating are also discussed.
Journal: Applied Surface Science - Volume 253, Issue 19, 31 July 2007, Pages 8086-8090