Threshold enhancement in two-photon photpolymerization

Yuri B. Boiko; Mark Shane Bowen; Mark M. Wang; Joannes M. Costa; Sadik C. Esener

doi:10.1117/12.390598

30 June 2000 Threshold enhancement in two-photon photpolymerization

Yuri B. Boiko, Mark Shane Bowen, Mark M. Wang, Joannes M. Costa, Sadik C. Esener

Proceedings Volume 4097, Complex Mediums; (2000) https://doi.org/10.1117/12.390598
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

It is demonstrated that threshold reduction of two-photon polymerization is achievable by means traditionally employed for sensitivity enhancement for single photon photoinitiation, such as heavy atom enhancement or intersystem crossing, electron donor agent, concentration increase of initiator. It is shown that measured threshold is in reverse proportion to square root of initiator concentration, whereas observed length of induction period exhibits reverse proportionality to the square of light intensity. Overall, experimentally observed threshold values of two-photon induced photopolymerization are effected by all intermediate stages of energy transformation in the photochemical sequences leading to photoinitiation, in particular inter-system crossing of excited initiating molecules as well as by monomer reactivity.

Citation Download Citation

Yuri B. Boiko, Mark Shane Bowen, Mark M. Wang, Joannes M. Costa, and Sadik C. Esener "Threshold enhancement in two-photon photpolymerization", Proc. SPIE 4097, Complex Mediums, (30 June 2000); https://doi.org/10.1117/12.390598

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