title: Single-beam Z-scan measurement of the third-order optical nonlinearities of azo dyes.
abstract: Organic dyes are very attractive optical materials for photonics and biophotonic applications. To quantitatively characterize their third-order nonlinear coefficients we have performed the experiments on two different azo dyes using a diode-pumped Nd:YAG laser at 532 nm. The |chi(3)| is of the order of 10(-6) esu. The relative contributions from nonlinear absorption (NLA) and nonlinear refraction (NLR) are dependent on the chemical structure and linear absorption of the dyes.
authors.affiliation: Department of Physics, Centre for Laser Technology, Anna University, Chennai, India. cgayathri_2006@yahoo.co.in
authors.forename: C
authors.initials: C
authors.lastname: Gayathri
authors.forename: A
authors.initials: A
authors.lastname: Ramalingam
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D004396:Coloring Agents / Q000737:chemistry*; D009282:Naphthalenesulfonates / Q000737:chemistry*; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D014867:Water
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D009282:Naphthalenesulfonates; D012996:Solutions; D014867:Water; C037541:red 2G; C408149:brilliant crocein