Abstract
Principal role of substrate types on the nonlinear optical properties of Au NP was investigated. Third harmonic generation (THG) studies were carried out for Au NP deposited on the Al-doped ZnO (AuNP/AZO) and Ga-doped ZnO (AuNP/GZO) substrates at fundamental wavelength of 20ns Er:glass laser (generating at 1540nm wavelength) during photostimulation by the 532nm 15ns laser pulses. Sizes of Au NP were 5nm, 10nm, 20nm, and 30nm. The output signal was registered at 513nm. The photoinduced power density was increased from 0 up to 800MW/cm2. So in our work we explore the role of the substrate on the optically stimulated non-linear optical properties during simultaneous photo stimulation near the inter-band transition. The results were studied depending on the type of substrate and the sizes of the deposited nanoparticles. The analysis was done within a framework of interaction between the photoinduced light and SPR wavelengths. Control of the photoinduced temperature was done.
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