Enhancement Of The Optical Polarization Effect On The Spr Response In Gold Micro/Nanoparticles Imaging
ADVANCED TOPICS IN OPTOELECTRONICS, MICROELECTRONICS AND NANOTECHNOLOGIES X(2020)
Abstract
In this work is presented the visible light optical polarization effect on surface plasmon resonance (SPR) response of ON-OFF type in both ordered and in contact gold nanoparticles, created within a micro/nanostructured round pattern by direct laser writing and single micrometric size gold particle, respectively, in a dielectric matrix. The large difference between the refractive index of gold and dielectric material allowed to record the polarization induced SPR response of ON-OFF type in gold micro/nanoparticles by optical microscopy imaging in bright field, but only for the large size particles that provided images both in reflection and transmission modes. The plasmonic coupling effect could be clearer visualized by enhancing the quality of the recorded optical images using a dedicated imaging processing algorithm, which applied a package of proper filters to remove the noise and the blur, but also to enhance the contrast of the original images.
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Key words
Gold micro/nanoparticles, surface plasmon resonance SPR, optical polarization, optical microscopy, bright field, imaging processing algorithm, noise, blur, contrast enhancement
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