Improving surface plasmon resonance sensors with speckle image processing

Autor(es)

Fernandez, Jorge R. ; Fujiwara, Eric ; Hernandez-Figueroa, Hugo E.

• Tipo de documento: Artigo Científico
• Fonte: OPTICS AND LASERS IN ENGINEERING; v. 178, p. 7-pg., 2024-04-18.

Resumo

This paper investigates digital image correlation approaches for assessing speckle patterns produced by surface plasmon resonance (SPR) imaging. An SPR sensor based on the Kretschmann setup comprising a gold-coated prism in a fixed angular position performs refractive index assessments in ethanol solutions. Subsequently, the acquisition system collects the reflected light and processes the speckle field images to evaluate the sensor's sensitivity, noise, and limit of detection. Based on three repetitions under similar conditions, the maximum resolution for the average intensity, zero-mean normalized cross-correlation, and the relative sum of square differences metrics are 4.90 x 10-4, -4 , 2.31 x 10-5, -5 , and 7.45 x 10-6 -6 RIU, respectively, leading to an improved limit of detection without modifying the optical setup. (AU)

• Processo FAPESP: 21/06506-0 - Metasurfaces totalmente dielétricas fortemente ressonantes baseadas em modos quase-escuros e toroidais
• Beneficiário: Hugo Enrique Hernández Figueroa
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 21/11380-5 - CPTEn - Centro Paulista de Estudos da Transição Energética
• Beneficiário: Luiz Carlos Pereira da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Ciência para o Desenvolvimento
• Processo FAPESP: 21/00199-8 - Redes e serviços inteligentes rumo 2030 (SMARTNESS)
• Beneficiário: Christian Rodolfo Esteve Rothenberg
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia