title: Spectral characteristics and nonlinear studies of crystal violet dye.
abstract: Solid-state dye-doped polymer is an attractive alternative to the conventional liquid dye solution. In this paper, the spectral characteristics and the nonlinear optical properties of the dye crystal violet are studied. The spectral characteristics of crystal violet dye doped poly(methylmethacrylate) modified with additive n-butyl acetate (nBA) are studied by recording its absorption and fluorescence spectra and the results are compared with the corresponding liquid mixture. The nonlinear refractive index of the dye in nBA and dye doped polymer film were measured using z-scan technique, by exciting with He-Ne laser. The results obtained are intercompared. Both the samples of dye crystal violet show a negative nonlinear refractive index. The origin of optical nonlinearity in the dye may be attributed due to laser-heating induced nonlinear effect.
authors.affiliation: Department of Physics, Centre for Laser Technology, Anna University, Chennai 600 025, India. sindhusukumaran@yahoo.co.in
authors.forename: V Sindhu
authors.initials: VS
authors.lastname: Sukumaran
authors.forename: A
authors.initials: A
authors.lastname: Ramalingam
mesh_terms: D000042:Absorption; D000085:Acetates / Q000737:chemistry; D000891:Anti-Infective Agents, Local / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D005840:Gentian Violet / Q000737:chemistry*; D006371:Helium / Q000737:chemistry; D007834:Lasers; D009356:Neon / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods*; D013816:Thermodynamics
chemical_list: D000085:Acetates; D000891:Anti-Infective Agents, Local; D004396:Coloring Agents; D011108:Polymers; D006371:Helium; C006848:butyl acetate; D009356:Neon; D019904:Polymethyl Methacrylate; D005840:Gentian Violet