Nonlocal nonlinear refractive index of gold nanoparticles synthesized by ascorbic acid reduction: comparison of fitting models.

Autor: Balbuena Ortega A; Facultad de Ciencias Físico-Matemáticas, Benemérita Universidad Autónoma de Puebla , Av. San Claudio y 18 Sur. Col. San Manuel, C.P. 72570 , Puebla , Puebla , México., Arroyo Carrasco ML; Facultad de Ciencias Físico-Matemáticas, Benemérita Universidad Autónoma de Puebla , Av. San Claudio y 18 Sur. Col. San Manuel, C.P. 72570 , Puebla , Puebla , México., Méndez Otero MM; Facultad de Ciencias Físico-Matemáticas, Benemérita Universidad Autónoma de Puebla , Av. San Claudio y 18 Sur. Col. San Manuel, C.P. 72570 , Puebla , Puebla , México., Gayou VL; CIBA-IPN Tlaxcala , Km. 1.5 Carretera Estatal Tecuexcomac-Tepetitla, C.P. 90700 , Tepetitla de Lardizabal , Tlaxcala , México., Delgado Macuil R; CIBA-IPN Tlaxcala , Km. 1.5 Carretera Estatal Tecuexcomac-Tepetitla, C.P. 90700 , Tepetitla de Lardizabal , Tlaxcala , México., Martínez Gutiérrez H; CNMN-IPN , Calle Luis Enrique Erro s/n, Unidad Profesional Adolfo López Mateos, Col. Zacatenco, C.P. 07738 DF , México., Iturbe Castillo MD; Instututo Nacional de Astrofísica Óptica y Electrónica , Luis Enrique Erro # 1, C.P. 72840 Tonantzintla , Puebla , México.
Jazyk: angličtina
Zdroj: Journal of modern optics [J Mod Opt] 2014 Dec 12; Vol. 61 (sup1), pp. S68-S73. Date of Electronic Publication: 2014 Aug 21.
DOI: 10.1080/09500340.2014.950621
Abstrakt: In this paper, the nonlinear refractive index of colloidal gold nanoparticles under continuous wave illumination is investigated with the z -scan technique. Gold nanoparticles were synthesized using ascorbic acid as reductant, phosphates as stabilizer and cetyltrimethylammonium chloride (CTAC) as surfactant agent. The nanoparticle size was controlled with the CTAC concentration. Experiments changing incident power and sample concentration were done. The experimental z -scan results were fitted with three models: thermal lens, aberrant thermal lens and the nonlocal model. It is shown that the nonlocal model reproduces with exceptionally good agreement; the obtained experimental behaviour.
Databáze: MEDLINE
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