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Sobre
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Sobre

Paulo Marques nasceu em Coruche, Portugal, em 1968. Licenciou-se em Física em 1991, concluiu o mestrado em Optoelectrónica e Lasers em 1995 e doutorou-se em Física em 2000 (todos os graus pela Universidade do Porto); é Professor Auxiliar no Departamento de Física e Astronomia da Faculdade de Ciências da Universidade do Porto desde 2002.

Desde Julho de 2000 que desenvolve a sua actividade de investigação no INESC Porto, onde tem sido responsável por diversos projetos nacionais e internacionais. Os seus interesses situam-se nos domínios da óptica guiada e microfabricação (guias de onda , sensores ópticos, fotosensibilidade, processos de escrita direta a laser com impulsos ultracurtos, etc). Publicou 33 patentes das quais 32 são internacionais, mais de 100 artigos em revistas e conferências internacionais e dois capítulos de livros. Desde Outubro de 2009 é o Coordenador do Centro de Fotónica Aplicada do INESCTEC e desde Maio de 2013 é também o Coordenador da Unidade de Micro e Nanofabricação (MNTEC) do Centro de Materiais da Univerisdade do Porto (CEMUP).

Tópicos
de interesse
Detalhes

Detalhes

010
Publicações

2021

Mach-Zehnder interferometer-based evanescent refractometer inscribed at the surface of Eagle2000 by femtosecond laser writing

Autores
Amorim, VA; Maia, JM; Viveiros, D; Marques, PVS;

Publicação
IEEE Sensors Journal

Abstract

2021

Wine Marketing Event – The Importance of Emotions in a Wine Tasting for Inexperienced Participants

Autores
de Lima, AP; Pacheco, J; Silva, P;

Publicação
Smart Innovation, Systems and Technologies

Abstract
The purpose of this article is to analyse the importance of emotions in a wine tasting experience for inexperienced participants. It is necessary to reduce elitism because customers who are not knowledgeable and inexperienced in wines can also do a wine tasting. They are also important consumers. The empirical study includes a questionnaire (n = 146) applied to inexperienced wine tasting participants. A conceptual model was built, and the results show that the composite of emotions: Comfort and Enthusiasm of participants can have a positive effect on their Satisfaction and consequent Word of Mouth. This study provides a relevant information on how wine companies can effectively promote wine tasting to inexperienced participants, and offer important implications for wine companies, especially for those offering wine tasting experiences to their visitors/customers. These types of participants are potential consumers and have significant importance for the market share. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

2021

Intensity-modulated refractometer based on mode-mismatch in surface waveguides inscribed by femtosecond laser direct writing

Autores
Amorim, VA; Viveiros, D; Maia, JM; Marques, PVS;

Publicação
OPTICS AND LASER TECHNOLOGY

Abstract
Optical waveguides were fabricated at the surface of Eagle2000 glass substrates, using femtosecond laser direct writing and wet etching, and their potential as intensity-modulated refractometers was assessed. Through the analysis of their broadband spectral response to different refractive index oils, we observed that mode mismatch is present when the guided mode reaches the surface of the substrate and interacts with the external medium, thus enabling the use of such optical waveguides in refractive index sensing. Refractive indices equal to or greater than that of the substrate also induced a coupling mechanism that was shown not to be suitable in these devices. The device's wavelength of operation was found to be tunable by controlling the distance between the surface and the center of the optical waveguide. However, the sensitivity was seen to diminish by increasing the latter, being nonexistent for distances greater than 5.5 mu m. In this study, the maximum sensitivity values were found for a surface to core center distance between 1 and 2 mu m, in the biological range, and 2.5 to 3 mu m, for a refractive index nearing that of the substrate. Accordingly, maximum sensitivities of approximate to 25 dB/RIU and approximate to 1200 dB/RIU were found between 1.300 < n(D)(25)degrees(C) < 1.400 and 1.490 < n(D)(25)degrees(C) < 1.500, respectively.

2020

Magnetic field sensors in fused silica fabricated by femtosecond laser micromachining

Autores
Maia, JM; Amorim, VA; Viveiros, D; Marques, PVS;

Publicação
Journal of Physics: Photonics

Abstract

2020

Femtosecond laser direct written off-axis fiber Bragg gratings for sensing applications

Autores
Viveiros, D; Amorim, VA; Maia, JM; Silva, S; Frazao, O; Jorge, PAS; Fernandes, LA; Marques, PVS;

Publicação
Optics and Laser Technology

Abstract
First order off-axis fiber Bragg gratings (FBGs) were fabricated in a standard single mode fiber (SMF-28e) through femtosecond laser direct writing. A minimum offset distance between the grating and core center of 2.5 µm was found to create a multimode section, which supports two separate fiber modes (LP0,1 and LP1,1), each split into two degenerate polarization modes. The resulting structure breaks the cylindrical symmetry of the fiber, introducing birefringence (˜10-4) resulting in a polarization dependent Bragg wavelength for each mode. Based on the modal and birefringence behavior, three off-axis FBGs were fabricated with 3.0, 4.5 and 6.0 µm offsets from the core center, and then characterized in strain, temperature, and curvature. The tested off-axis FBGs exhibited a similar strain sensitivity of ~1.14 pm/µ? and a temperature sensitivity of ~12 pm/C. The curvature and orientation angle were simultaneously monitored by analyzing the intensity fluctuation and the wavelength shift of the LP1,1 Bragg resonance. A maximum curvature sensitivity of 0.53 dB/m-1 was obtained for the off-axis FBG with a 3.0 µm offset. © 2020 Elsevier Ltd

Teses
supervisionadas

2020

Fast prototyping of advanced sensing devices using three-dimensional direct writing with femtosecond laser

Autor
Vítor Alexandre Oliveira Amorim

Instituição
UP-FCUP

2020

Fabrication of opticals Ensing devices by 3D laser  micromachining

Autor
Carlos Duarte Rodrigues Viveiros

Instituição
UP-FCUP

2020

Fabricação de nanoestruturas por fotopolimerização multifotão com laser femtosegundo

Autor
José Miguel Trigo de Mesquita e Silva

Instituição
UP-FCUP

2019

High Power Fiber Lasers and Amplifiems -Power Scaling and Performance limitations

Autor
Miguel Alexandre Ramos de Melo

Instituição
UP-FCUP

2019

Fabrication of opticals Ensing devices by 3D laser micromachining

Autor
Carlos Duarte Rodrigues Viveiros

Instituição
UP-FCUP