Fabrication of submicrometer structures by two-photon-initiated polymerization is performed with an inexpensive and low-power microlaser. This is made possible by the design of photoinitiators with strong two-photon absorption cross sections. We analyze the influence of both material properties and irradiation conditions on the two-photon polymerization rate and show that resins based on our highly sensitive two-photon photoinitiator can be solidified with microlaser excitation, whereas commercial UV photoresins require ultrashort and intense laser pulses.
© 2002 Optical Society of America
(160.4330) Materials : Nonlinear optical materials
(160.5470) Materials : Polymers
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(220.4000) Optical design and fabrication : Microstructure fabrication
(350.3390) Other areas of optics : Laser materials processing
Irène Wang, Michel Bouriau, Patrice L. Baldeck, Cecile Martineau, and Chantal Andraud, "Three-dimensional microfabrication by two-photon-initiated polymerization with a low-cost microlaser," Opt. Lett. 27, 1348-1350 (2002)