Systematic comparison between photonic sensors based on dielectrics and metals
Photonic biosensors have gained much attention recently due to their high sensitivity, low energy consumption and miniaturization capability; in the near future, these sensors will form the basis of the so-called Lab on a Chip: a device capable of performing accurate clinical analyzes in a single ch...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Brasil |
| Institución: | Universidade de São Paulo (USP) |
| Repositorio: | Biblioteca Digital de Teses e Dissertações da USP |
| Idioma: | inglés |
| OAI Identifier: | oai:teses.usp.br:tde-12052023-100106 |
| Acceso en línea: | https://www.teses.usp.br/teses/disponiveis/18/18155/tde-12052023-100106/ |
| Access Level: | acceso abierto |
| Palabra clave: | biosensores biosensors comparação sistêmica fotônica photonics systemic comparison |
| Sumario: | Photonic biosensors have gained much attention recently due to their high sensitivity, low energy consumption and miniaturization capability; in the near future, these sensors will form the basis of the so-called Lab on a Chip: a device capable of performing accurate clinical analyzes in a single chip and in any location, being of great help in countries with few resources for disease detection. There are several configurations for biophotonic sensors ranging from fiber-optic based systems, waveguides, resonators, to nanoparticles and photonic crystals, to name a few. In spite of this great diversity, constituted by dielectric or metallic media, these devices can be classified in two broad categories: those that require previous mode coupling and those that do not. The purpose of this dissertation is to study the devices of the second category, focusing on the so-called quasi-guided modes, presenting the physical phenomena involved and the main tools used to evaluate their performances. Therefore, using numerical simulations, present a comparative study between dielectric and metallic systems. Finally, a dielectric based biosensor is proposed, aiming on obtaining the similar performances of devices based on metal. |
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