Chaotic signatures of photoconductive Cu2ZnSnS4 nanostructures explored by Lorenz attractors

• Published in: New journal of physics Vol. 20; no. 2; pp. 023048 - 23056
• Main Authors: Hernández-Acosta, M A, Trejo-Valdez, M, Castro-Chacón, J H, Torres-San Miguel, C R, Martínez-Gutiérrez, H, Torres-Torres, C
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 22.02.2018
• Subjects: chaotic attractors; Copper zinc tin sulfide; Electrical phenomena; electrochemical impedance spectroscopy; Nanostructure; Neodymium lasers; nonlinear optics; Optical properties; Optoelectronics; Photoelectricity; Physics; Semiconductor lasers; Spray pyrolysis; Thin films; Two-wave mixing; YAG lasers
• ISSN: 1367-2630
• DOI: 10.1088/1367-2630/aaad41

Photoconductive and third-order nonlinear optical properties exhibited by Cu2ZnSnS4 nanostructures are presented. The samples were synthetized in thin film form by a spray pyrolysis processing route. Distinctions in the photoconductive behavior throughout the samples were clearly noted by modulating their optoelectronic response dependent on electrical frequency. Vectorial two-wave mixing experiments were carried out at a 532 nm wavelength provided by a Nd:YAG laser system to study the optical nonlinearities in the samples. An induced transparency effect was observed during nanosecond single-beam experiments in the nanostructures reported. Quantum and thermal processes were considered to be the main physical mechanism responsible for the photo-electrical phenomena and nonlinear refraction in the nanostructures. Potential applications for developing nanophotonic and nanoelectronic instrumentation systems can be contemplated.