Two-photon-induced birefringence in azo-dye bearing polyimide; the birefringence changes versus the writing power

• DOI: 10.1007/s00340-011-4547-7
• Publication Date: 2011-05-09T12:32:21Z
• Authors: A. Kozanecka-Szmi...; K. Switkowski; E. Schab-Balcerzak; E. Grabiec
• Keywords: Two-Photon Absorption

Ultra-short high-intensity light pulses were utilized to induce the optical birefringence in a polyimide material possessing azo-dye covalently bonded main chain. The obtained results showed that two-photon absorption process was involved creation of sample which, best our knowledge, not previously reported for materials. growths and decays examined as functions pulse intensities. No damage during illumination detected wide range powers applied. High level order 0.005 measured.