Twisted light by a Kerr-like TiO2 thin film with Au-Pt nanoparticles

H. Martines-Arano; A. J. Piña-Díaz; C. R. Torres-SanMiguel; M. Trejo-Valdez; C. Torres-Torres

doi:10.1117/12.2535817

6 December 2019 Twisted light by a Kerr-like TiO₂ thin film with Au-Pt nanoparticles

H. Martines-Arano, A. J. Piña-Díaz, C. R. Torres-SanMiguel, M. Trejo-Valdez, C. Torres-Torres

Author Affiliations +

Proceedings Volume 11371, International Workshop on Thin Films for Electronics, Electro-Optics, Energy, and Sensors 2019; 113710E (2019) https://doi.org/10.1117/12.2535817
Event: International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors, 2019, Reykjavik, Iceland

Abstract

Third-order nonlinear optical effects exhibited by Gold-Platinum nanoparticles in a Titanium Dioxide thin solid film were induced by a two-wave mixing configuration with digitally-modulated irradiance profiles. The nanomaterials were prepared by a sol-gel method, and a spinning coating technique was employed for the preparation of the samples in thin film form. We used a Nd:YAG laser system at 532 nm wavelength and 4 nanosecond for the exploration of the thirdorder optical nonlinearities. The characterization of the morphology and optical transmittance was carried out by transmission electronic microscopy and UV-vis spectroscopy studies; respectively. A round continuously variable nonlinear refractive index was proposed to generate twisted light by nanosecond pulses in the sample. The system was designed with a randomly distributed density of the nanoparticles. This technique can be considered an alternative for performing ultrafast all-optical instrumentation functions.

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H. Martines-Arano, A. J. Piña-Díaz, C. R. Torres-SanMiguel, M. Trejo-Valdez, and C. Torres-Torres "Twisted light by a Kerr-like TiO₂ thin film with Au-Pt nanoparticles", Proc. SPIE 11371, International Workshop on Thin Films for Electronics, Electro-Optics, Energy, and Sensors 2019, 113710E (6 December 2019); https://doi.org/10.1117/12.2535817

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KEYWORDS

Nanoparticles

Refractive index

Two wave mixing

Nonlinear optics

Thin films

Absorption

Kerr effect

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