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Sobre

Sobre

José Manuel Baptista graduated in “Electrical and Computer Engineering” from the University of Porto, Porto, Portugal, in 1991, followed by the M.Sc. degree in “Physics of Laser Communications” from the University of Essex, Colchester, U.K., in 1993, and then he obtained the Ph.D. degree in “Electrical and Computer Engineering” from the University of Porto, in 2002.

Currently, he is the Vice-Rector of the University of Madeira for Research and External Relations. He is Associate Professor of the Exact Sciences and Engineering Department of the University of Madeira, Portugal. He is also Senior Researcher in the Optoelectronics and Electronics Systems Unit at INESC Porto, Portugal.

His main scientific areas are the fiber optic sensors, fiber optic communications and fiber optic technologies. He is author of 78 journal publications, 110 communications in national and international conferences, 3 chapter books, 2 patents, reviewer of several scientific publications, and member of various international scientific organizations. He was recently the Leader of the European INTERREG SUDOE Project "ECOAL-MGT - Ecological Management of Coal Waste Piles, SOE3/P2/P714 and he has participated in several national and international funded scientific projects.

Tópicos
de interesse
Detalhes

Detalhes

003
Publicações

2019

New Trends in the Simulation of Nanosplasmonic Optical D-Type Fiber Sensors

Autores
Guerreiro, A; Santos, DF; Baptista, JM;

Publicação
SENSORS

Abstract
This article presents a review of the numerical techniques employed in simulating plasmonic optical sensors based on metal-dielectric nanostructures, including examples, ranging from conventional D-type fiber sensors, to those based on photonic crystal D-type fibers and incorporating metamaterials, nanowires, among other new materials and components, results and applications. We start from the fundamental physical processes, such as optical and plasmonic mode coupling, and discuss the implementation of the numerical model, optical response customization and their impact in sensor performance. Finally, we examine future perspectives.

2019

Enhancing nanoplasmonic sensing with metallic nanowires: From D-type to suspended core fibres

Autores
dos Santos, DN; Guerreiro, A; Baptist, JM;

Publicação
Proceedings of SPIE - The International Society for Optical Engineering

Abstract
This paper explores and compares three different plasmonic optical fibre sensor configurations, based on D-type and suspended core fibres combined with metallic nanowires, and investigates how their different geometrical parameters can affect the coupling between the guided optical mode supported by fibres and the localized plasmonic modes, and how that ultimately results in improved sensor performance. Fibre optical sensors based on plasmonic resonances with metallic nanostructures have revolutionized the field of optical sensing because they have permitted to obtain sharper and fine-tuned resonances with higher sensitivity. The essence for exploring the properties of localized plasmonic modes and their coupling with the optical guided mode depends not only on the choice of the materials employed in the device, but also on the geometry of the different components and their relative position, which ultimately determines the spatial distributions of optical power of the different modes and consequently their overlap and coupling. In this work, we use numerical simulations based on finite element methods to demonstrate the importance of shaping the features of the guided optical mode to promote the coupling with the localized modes, in the two types of fibres considered. The results clarify some of the fundamental aspects behind the operation of these devices and provide novel proposals for enhanced refractive index sensors. © 2019 SPIE.

2019

Evaluation of Nanoplasmonic Optical Fiber Sensors Based on D-Type and Suspended Core Fibers with Metallic Nanowires

Autores
Santos, D; Guerreiro, A; Baptista, JM;

Publicação
PHOTONICS

Abstract
The introduction of metallic nanostructures in optical fibers has revolutionized the field of plasmonic sensors since they produce sharper and fine-tuned resonances resulting in higher sensitivities and resolutions. This article evaluates the performance of three different plasmonic optical fiber sensors based on D-type and suspended core fibers with metallic nanowires. It addresses how their different materials, geometry of the components, and their relative position can influence the coupling between the localized plasmonic modes and the guided optical mode. It also evaluates how that affects the spatial distributions of optical power of the different modes and consequently their overlap and coupling, which ultimately impacts the sensor performance. In this work, we use numerical simulations based on finite element methods to validate the importance of tailoring the features of the guided optical mode to promote an enhanced coupling with the localized modes. The results in terms of sensitivity and resolution demonstrate the advantages of using suspended core fibers with metallic nanowires.

2019

Functional metamaterials for optical sensing of hydrogen

Autores
Guerreiro, A; Apolinario, A; Lopes, A; Hierro Rodriguez, A; Aguilar, G; Baptista, JM; Silva, NA; Frazao, O; Quiterio, P; Jorge, P; Rodrigues, P; Moraes, SS; Silva, S; Ferreira, TD; Santos, JL; Araujo, JP;

Publicação
Proceedings of SPIE - The International Society for Optical Engineering

Abstract
We present the design, fabrication and optical characterization of functional metamaterials for optical sensing of Hydrogen based on inexpensive self-assembly processes of metallic nanowires integrated in nanoporous alumina templates[37-42]. The optical properties of these materials strongly depend on the environmental concentration or partial pressure of hydrogen and can be used to develop fully optical sensors that reduce the danger of explosion. Optical metamaterials are artificial media, usually combining metallic and dielectric sub-wavelength structures, that exhibit optical properties that cannot be found in naturally occurring materials. Among these, functional metamaterials offer the added possibility of altering or controlling these properties externally after fabrication, in our case by contact with a hydrogen rich atmosphere. This dependency can be used to design[43-45]and develop optical sensors that respond to this gas or to chemical compounds that contain or release hydrogen. In this paper we present some designs for hydrogen functional metamaterials and discuss the main parameters relevant in the optimization of their response. © 2019 SPIE.

2017

Optimization of modal sensitivity in nanowire SPR multimode sensor

Autores
Santos, DF; Guerreiro, A; Baptista, JM;

Publicação
2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS)

Abstract
This paper presents a multimode fiber sensor that uses surface plasmon resonance on a metallic wire to measure refractive index. Numerical simulations based on the finite element method reveal the sensor supports several plasmon modes in the wire capable of coupling with the multiples optical fiber modes. Therefore, the sensor configuration creates multiple resonances at different wavelengths, with different values of the loss, sensitivity, among other parameters. Choosing the appropriate mode and filtering out the rest of the modes allows to optimize the sensor performance. In the present work a sensitivity of 5340nm/RIU and resolution of 1.87x10(-6) RIU were found.

Teses
supervisionadas

2017

A numerical approach into new designs for SPR sensors in D-type optical fibers

Autor
Diego Felipe de Nóbrega dos Santos

Instituição
UMa

2016

A numerical approach into new designs for SPR sensors in D-type optical fibers

Autor
Diego Felipe de Nóbregra dos Santos

Instituição
UMa

2016

Optical fiber sensors technology for supervision, control and protection of high power systems

Autor
Ivo Maciel Nascimento

Instituição
UP-FCNA