Title: Third-order nonlinear response in cubic concave gold nanoparticles

Authors: Héctor Sánchez-Esquivel; Bonifacio Can-Uc; Raúl Rangel-Rojo; Mariana J. Oviedo-Bandera; José M. Romo-Herrera

Addresses: Departamento de Óptica, División de Física Aplicada, CICESE, Carretera Ensenada-Tijuana No. 3918, Zona Playitas, C.P. 22860, Ensenada, Baja California, Mexico ' Departamento de Óptica, División de Física Aplicada, CICESE, Carretera Ensenada-Tijuana No. 3918, Zona Playitas, C.P. 22860, Ensenada, Baja California, Mexico ' Departamento de Óptica, División de Física Aplicada, CICESE, Carretera Ensenada-Tijuana No. 3918, Zona Playitas, C.P. 22860, Ensenada, Baja California, Mexico ' Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km. 107 Carretera Tijuana a Ensenada, C.P. 22860, Ensenada, Baja California, Mexico ' Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km. 107 Carretera Tijuana a Ensenada, C.P. 22860, Ensenada, Baja California, Mexico

Abstract: Concave cubic nanoparticles were theoretically proposed as strong sources of non-linear phenomena such as the optical Kerr effect. In this work, concave cubic gold nanoparticles were prepared by the Turkevich method. A comparison of the third-order susceptibility χ⁽³⁾ response with regard to the nanoparticle size was realised in the non-resonant regime by the use of the Z-Scan technique. These measurements were done with ultra-short pulses in the near IR (λ = 830 nm). We also studied their temporal dependence in order to obtain the non-thermal non-linear response with the use of a pulse-train chopper.

Keywords: third-order nonlinear response; cubic concave nanoparticles; gold nanoparticles; nonlinear refraction; ultra-short pulses; Turkevich method; optical Kerr effect; Z-scan; third-order susceptibility; nanotechnology.

DOI: 10.1504/IJNT.2016.074525

International Journal of Nanotechnology, 2016 Vol.13 No.1/2/3, pp.80 - 94

Published online: 04 Feb 2016 *

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