Share Email Print
cover

Proceedings Paper

Nonlinear absorption and refraction measurements of Fluorene-based molecules via Picosecond Z-scans
Author(s): Raz Gvishi; Tarik H. McMillian; David J. Hagan; Eric W. Van Stryland; Katherine J. Schafer; Sheng Yao; Kevin D. Belfield
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Fluorene-based molecules were studied in detail as candidates for two-photon absorption (2PA) applications. Previous studies were carried out over the wavelengths range 560 - 900 nm. In this work we have extended our studies to shorter wavelengths in order to determine behavior closer to the 2PA resonance peak. We used picosecond pulses at 532 nm for performing open and closed aperture Z-scan measurements, in order to obtain both the real part of the third order nonlinearity (χr(3)), corresponding to nonlinear refraction (n2) and the imaginary part of the third order nonlinearity (χi(3)), corresponding to nonlinear absorption (β) due to 2PA. We studied several fluorene-based molecules, which differ by length of conjugation system and substitution moieties. From open aperture Z-scan measurements we obtained the imaginary part of the third order nonlinearity (χi(3)). We measured 2PA cross-sections, δ, varying from 1,000 up to 10,000 GM at 532 nm. The influence of the molecular structure on δ was examined. For some of the dyes we also measured n2 via closed aperture Z-scan measurements. By subtracting the contribution of the solvent from the observed value for the solution, we obtain the contribution to n2 due to the solute.

Paper Details

Date Published: 18 August 2005
PDF: 8 pages
Proc. SPIE 5934, Nonlinear Optical Transmission and Multiphoton Processes in Organics III, 59340C (18 August 2005); doi: 10.1117/12.618467
Show Author Affiliations
Raz Gvishi, College of Optics and Photonics/Univ. of Central Florida (United States)
Tarik H. McMillian, College of Optics and Photonics/Univ. of Central Florida (United States)
David J. Hagan, College of Optics and Photonics/Univ. of Central Florida (United States)
Eric W. Van Stryland, College of Optics and Photonics/Univ. of Central Florida (United States)
Katherine J. Schafer, Univ. of Central Florida (United States)
Sheng Yao, Univ. of Central Florida (United States)
Kevin D. Belfield, College of Optics and Photonics/Univ. of Central Florida (United States)
Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 5934:
Nonlinear Optical Transmission and Multiphoton Processes in Organics III
A. Todd Yeates, Editor(s)

© SPIE. Terms of Use
Back to Top