In this paper, we present the linear and nonlinear optical properties of an organic dye, 4,8,12-tri-n-octyl-4,8,12-triazatriangulenium tetrafluoroborate. Transmission Z-scan setup was used to measure the third-order nonlinear optical absorption and susceptibility. Open aperture configuration reveals a concurrence of saturable absorption peak and reverse saturable absorption valley. The SA/RSA curves were interpreted on the basis of single-photon and two-photon absorption respectively. The closed aperture configuration shows an asymmetrical peak-valley indicating a negative refractive index due to self-defocussing phenomena.

© 2016 Optical Society of America

PDF Article
This paper was not presented at the conference


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription