Mechano-optic logic gate controlled by third-order nonlinear optical properties in a rotating ZnO:Au thin film

Carrillo-Delgado, C.; Garcia-Gil, C. I.; Trejo-Valdez, M.; Torres-Torres, C.; Garcia-Merino, J. A.; Martinez-Gutierrez, H.; Khomenko, A. V.; Torres-Martinez, R.


Measurements of the third-order nonlinear optical properties exhibited by a ZnO thin solid film deposited on a SnO2 substrate are presented. The samples were prepared by a spray pyrolysis processing route. Scanning electron microscopy analysis andUV-Vis spectroscopy studies were carried out. The picosecond response at 1064 nm was explored by the z-scan technique. A large optical Kerr effect with two-photon absorption was obtained. The inhibition of the nonlinear optical absorption together with a noticeable enhancement in the optical Kerr effect in the sample was achieved by the incorporation of Au nanoparticles into the ZnO film. Additionally, a two-wave mixing configuration at 532 nmwas performed and an optical Kerr effect was identified as the main cause of the nanosecond third-order optical nonlinearity. The relaxation time of the photothermal response of the sample was estimated to be about 1 s when the sample was excited by nanosecond single-shots. The rotation of the sample during the nanosecond two-wave mixing experiments was analyzed. It was stated that a non-monotonic relation between rotating frequency and pulse repetition rate governs the thermal contribution to the nonlinear refractive index exhibited by a rotating film. Potential applications for switching photothermal interactions in rotating samples can be contemplated. A rotary logic system dependent on Kerr transmittance in a two-wave mixing experiment was proposed.

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Título según WOS: ID WOS:000377784000012 Not found in local WOS DB
Volumen: 3
Número: 1
Fecha de publicación: 2016


Notas: ISI