GLASSES AND THIN FILMS FOR NANOPHOTONICS AND INTEGRATED OPTICS

Contacts

Rui M. Almeida: tel +351-218418110/135; room 5.10, Pav. Civil; rui.almeida@ist.utl.pt

M. Clara Gonçalves: tel +351-218418112; room 5.12, Pav. Civil; clara.goncalves@ist.utl.pt

Luís F. Santos: tel +351-218418113; room 5.13, Pav. Civil; luis.santos@ist.utl.pt

Luís M. Fortes: tel +351-218418109; room 5.09, Pav. Civil; luis.fortes@ist.utl.pt

Yigang Li: tel +351-218418103; room 5.03, Pav. Civil; yigang.li@ist.utl.pt

Ana Gama: tel +351-218418109; room 5.09, Pav. Civil; ana.gama@ist.utl.pt

Yuliya Vueva: tel +351-218418108; room 5.08, Pav. Civil; yuliya.vueva@ist.utl.pt

Rodrigo Santos: tel +351-218418137; room 5.37, Pav. Civil; rodrigo53969@hotmail.com>

Ricardo Cardoso: tel +351-218418109; room 5.09, Pav. Civil; ricardo.cardoso@ist.utl.pt

Areas of work


This research group is devoted to the preparation, development and characterisation of optical and photonic materials, in particular glasses and thin films, both amorphous and nanocrystalline, for passive and active integrated optics and other optical applications. Such materials are prepared either by melting, or by sol-gel processing of a room temperature liquid phase.

The group is interested in the structure and properties of such materials, studied by optical spectroscopies (UV-Visible, FTIR and Raman), electron spectroscopy (XPS) and X-ray spectroscopies (EXAFS and XANES), whereas the nanoscale microstructures are investigated by electron microscopies (SEM and TEM) and Atomic Force Microscopy (AFM). Other techniques used include spectroscopic ellipsometry and m-line spectrometry.

Particular emphasis is placed on the optical properties related to active applications in integrated optics, such as waveguide mode characteristics, light emission from lanthanide ions like Er3+ (including the fluorescence spectra and corresponding emission lifetimes) and the optical loss, measured at different laser wavelengths. There is also a directed effort on nanocrystalline films doped with both lanthanide (Er3+, Yb3+, ...) and noble metal elements (such as silver and gold) and on photonic bandgap materials and structures, prepared by sol-gel processing. The later include both 1-D Fabry-Perot micro-cavities doped with Er3+ and Yb3+ and 3-D colloidal photonic crystal opals and inverted opals prepared by self-assembly from materials like polystyrene, silica and titania. A new line of work deal with the development of bioactive scaffolds for bone tissue regeneration, prepared by sol-gel processing with dual hierarchical porosity at nano and macro scales.

Research team


Rui M. Almeida

Fotografia: Rui Almeida

Professor of Materials Science and Engineering (IST), Ph.D., FSGT, FAcerS

Aggregation in Materials Engineering, Instituto Superior Técnico, Lisboa, 1987

Ph.D. in Materials Engineering, University of California, Los Angeles, (USA), 1980

M.S. in Materials Engineering, University of California, Los Angeles, (USA), 1978

Bachelor´s Degree in Chemical Engineering, Instituto Superior Técnico, Lisboa, 1975

Research interests

  • Visible absorption, fluorescence, IR and Raman spectroscopies, m-line spectroscopy and spectroscopic ellipsometry.
  • EXAFS and SAXS spectroscopies.
  • Silicate planar waveguides doped with rare-earths, prepared by sol-gel processing.
  • Integrated optical materials and structures.
  • Laser patterning of photonic nano-structures.
  • Rare-earth doped transparent glass ceramics.
  • Photonic bandgap materials and structures, prepared by sol-gel processing.
  • Bioactive sol-gel scaffolds for bone tissue regeneration.


Clara Gonçalves

Fotografia: Clara Goncalves

Assistant Professor of Materials Science and Engineering (IST)

Ph.D. in Materials Engineering, Instituto Superior Técnico, Lisboa, 1993

M.S. equivalent in Materials Engineering, Instituto Superior Técnico, Lisboa, 1988

Bachelor´s Degree in Chemical Engineering, Instituto Superior Técnico, 1983.

Research interests

  • Transparent glass ceramics for application in optical communications.
  • Study of the crystallization in glass ceramics by Atomic Force Microscopy.
  • EXAFS spectroscopy, using synchrotron radiation.
  • High porosity hybrid silicate thin films, prepared by sol-gel processing involving micelles.
  • Nanostructured mesoporous silica films.
  • 3-D photonic bandgap structures prepared by self-assembly of colloids.


Luís Santos

Fotografia: Luis Santos

Assistant Professor of Materials Science and Engineering (IST)

Ph.D. in Materials Engineering, Instituto Superior Técnico, Lisboa, 1996

M.S. equivalent in Materials Engineering, Instituto Superior Técnico, Lisboa, 1990

Bachelor´s Degree in Metallurgical Engineering, Instituto Superior Técnico, Lisboa, 1985

Research interests

  • Transparent glass ceramics doped with rare earths, for optoelectronics.
  • Structural anomaly of alkali germanates glasses (study of physical and spectroscopic properties).
  • IR, Raman and Ellipsometry spectroscopies.
  • Optical characterization of Erbium doped tellurite glasses and other heavy metal oxide glasses.
  • Medical applications of Raman spectroscopy.


Luís M. Fortes

Fotografia: Luis Fortes

Post-doctoral fellow

Ph.D. in Materials Engineering, Instituto Superior Técnico (IST), Lisboa, 2006

Bachelor´s Degree in Technological Chemistry, FCUL,Universidade de Lisboa, 1997

Research interests

  • Transparent glass ceramics containing rare-earth ions, for integrated optical applications.
  • Thermal characterization, optical spectroscopies and electron microscopies.
  • Optical characterization (Photoluminescence and lifetime measurements) of Erbium-doped Tellurite Glasses.
  • EXAFS and GISAXS spectroscopies and XRD, using synchrotron radiation.
  • Fabrication and characterization of 3-D Photonic bandgap materials and structures, prepared by sol-gel processing, for application in fiberoptic telecommunications systems.


Yigang Li

Fotografia: Yigang Li

Assistant Researcher of Materials Science and Engineering (IST)

Lecturer of Optical Science and Engineering, Fudan University, Shanghai, (China), 2005

Ph.D. in Optical Science and Engineering, Fudan University, Shanghai, (China), 2005

Bachelor's Degree in Physics, Fudan University, Shanghai, (China), 1999

Research interests

  • Novel optical materials and techniques to fabricate waveguide and fiber devices, especially by sol-gel method or photosensitivity.
  • Optical properties of rare earth doped materials.
  • Design and optimization of waveguide and fiber passive/active devices.


Ana Gama

Fotografia: Ana Gama

Research Grant

Degree in

Research interests

  • Development of nano/macroporous bone tissue scaffolds by sol-gel processing, for regenerative medicine.


Yuliya Vueva

Fotografia: Yuliya Vueva

Post-doctoral fellow

Ph.D. in Technology of silicate and hard melting nonmetallic materials, University of Chemical Technology and Metallurgy, Sofia, Bulgaria (2008)

Master’s Degree in Chemical Engineering, Technology of silicate materials, University of Chemical Technology and Metallurgy, Sofia, Bulgaria (1999)

Research interests

  • Development of nano/macroporous bone tissue scaffolds by sol-gel processing, for regenerative medicine
  • Synthesis of silicon oxycarbide glasses and nanocomposites by sol-gel method
  • Sol-gel synthesis of hybrid-organic inorganic materials for proton conducting membranes


Rodrigo Santos

Fotografia: Rodrigo Santos

Research grant

Degree in Materials Engineering, Instituto Superior Técnico (IST), Lisboa, 2008

Research interests

  • Transparent glass ceramics doped with rare earths, for optoelectronics.


Ricardo Cardoso

Fotografia: Ricardo Cardoso

Research Grant

Student in Materials Engineering

Research interests

  • Transparent glass ceramics doped with rare earths, for optoelectronics.


Laboratories and Equipments


IST (Ciência building):
  • Glass preparation lab: room 01-5.2, tel. 351-21-8419027

    Equipments:
  • Controlled atmosphere glove-box
  • High temperature (1700 Celsius) and low temperature muffle furnaces.

  • DSC / Sol-gel lab: room 03-04, tel. 351-21-8417885

    Equipments:
  • Dip and spin-coating equipments, for sol-gel film deposition.
  • Differential scanning calorimeter, for measurements up to 725 Celsius.
  • BET surface area analyzer.
  • Controlled atmosphere glove-box

  • FTIR lab: room 01-5.7, tel. 351-21-8417903

    Equipments:
  • FTIR spectrometer, for IR spectroscopy in transmission and reflection (specular, difuse or ATR), operating between 25000-50 cm-1 (VIS+NIR+MIR+FIR).

  • Raman lab: room 01-5.9, tel. 351-21-8417904

    Equipments:
  • Triple Raman spectrometer, excited by an Ar ion laser, for microRaman measurements.
  • Macro Raman double spectrometer, with excellent resolution down to within ~ 5 cm-1 from the Ar ion laser line.
  • Setups for fluorescence, lifetime and optical loss measurements in planar optical waveguides.

  • Ellipsometer lab: room 01-5.6, tel. 351-21-8417716

    Equipments:
  • Variable angle spectroscopic ellipsometer.
  • M-line spectrometer with optical loss measurement capability.

    Recent publications


    2009


  • M.C. Gonçalves, L.M. Fortes, R.M. Almeida, A. Chiasera, A. Chiappini, M. Ferrari, “3-D Rare earth-doped colloidal photonic crystals”, Optical Materials 31 (2009) 1315-1318.
  • L.M. Fortes, M.C. Gonçalves and R.M. Almeida, “Processing optimization and optical properties of 3-D photonic crystals”, J. of Non-Crystalline Solids 355 (2009) 1189-1192.
  • A. Chiappini, C. Armellini, A. Chiasera, M. Ferrari, L.M. Fortes, M.C. Gonçalves, R. Guider, Y. Jestin, R. Retoux, G.N. Conti, S. Pelli, R.M. Almeida, and G.C. Righini, “An alternative method to obtain direct opal photonic crystal structures”, J. of Non-Crystalline Solids 355 (2009) 1167-1170.
  • Rodrigo Santos, João Bastos, Luís F. Santos e Rui M. Almeida “Vidros cerâmicos nanocristalinos transparentes”, Ciência e Tecnologia dos Materiais, vol. 21 [1/2] (2009) 11-26.
  • Gregory J. Brentrup, Hassan M. M. Moawad, Luis F. Santos, Rui M. Almeida, Himanshu Jain, “Structure of Na2O-CaO-P2O5-SiO2 glass-ceramics with multimodal porosity”, J. Am. Cer. Soc., 92 [1] (2009) 249–252
  • Luís F. Santos and Rui M. Almeida, “Vibrational spectra and alkali ion motions in binary silicate glasses”, European Journal of Glass Science & Technology Part B (Physics and Chemistry of Glasses) B 50 (2009) 41 - 44.
  • Luis F. Santos, Ashtosh Ganjoo, Himanshu Jain, Rui M. Almeida, “Optical and spectroscopic characterization of germanium selenide glass films”, J. Non-Crystalline Solids (accepted for publication in J. Non-Crystalline Solids, 2009).
  • R. Ayouchi, R. Schwarz, L.V. Melo, R. Ramalho, E. Alves, C.P. Marques, L. Santos, R. Almeida, O. Conde, “Optical Properties of Silicon Thin Films by PLD” Applied Surface Science 255 (2009) 5299-5302.




    2008


  • Rui M. Almeida and Ana C. Marques, “The potential of ion exchange in sol-gel derived photonic materials and structures”, Mater. Sci. Engr. B 149 (2008) 118 – 122.
  • Francesco d'Acapito, Ana C. Marques, Luís F. Santos and Rui M. Almeida, “EXAFS study of the Er3+ ion coordination in SiO2 –TiO2 –HfO2 sol-gel films”, J. Non- Crystalline Solids 354 (2008) 4940 - 4943.
  • M.A. Aegerter, Rui M. Almeida, A. Soutar, K. Tadanaga, Hui Yang, T. Watanabe, “Coatings made by sol-gel and chemical nanotechnology”, J. Sol- Gel Sci. Technol. 47 (2008) 203 – 236.




    2007


  • Giancarlo C. Righini, Cristiana Armellini, Andrea Chiappini, Alessandro Chiasera, Yoann Jestin, Maurizio Ferrari, Maurizio Montagna, Claire Arfuso Duverger, Patrice Féron, Massimo Brenci, Gualtiero Nunzi Conti, Stefano Pelli, M. Clara Gonçalves and Rui M. Almeida and “Er3+ - activated sol-gel silica derived spherical microresonators”, Glass Technol.: Eur. J. Glass Sci. Technol. A 48 (2007) 200 – 203.
  • Ana C. Marques, Himanshu Jain and Rui M. Almeida, “Sol-gel derived nano/macroporous monolithic scaffolds”, Phys. Chem. Glasses: Eur. J. Glass Sci. Technol. B - 48 (2007) 65 – 68.
  • A. Chiappini, C. Armellini, A. Chiasera, Y. Jestin, M. Ferrari, M. Mattarelli, M. Montagna, E. Moser, C. Tosello, L. Zampedri, G. Nunzi Conti, S. Pelli, Rui M. Almeida and G.C. Righini, “Er3+ - activated silica inverse opals synthetized by the sol-gel method”, Optoelectronics Lett. 3 (2007) 184-187.
  • A. Chiappini, C. Armellini, A. Chiasera, M. Ferrari, Y. Jestin, M. Mattarelli, M. Montagna, E. Moser, G. Nunzi Conti, S. Pelli, G.C. Righini, M. Clara Gonçalves, Rui M. Almeida, “Design of photonic structures by sol-gel derived silica nanospheres”, J. Non-Crystalline Solids 353 (2007) 674-678.
  • Ana C. Marques and Rui M. Almeida, “Er photoluminescence enhancement in Ag-doped sol-gel planar waveguides”, Journal of Non-Crystalline Solids 353 (2007)2613-2618.
  • Rui M. Almeida, Ana C. Marques, Alessandro Chiasera, Andrea Chiappini, Maurizio Ferrari, “Rare-earth doped photonic crystal microcavities prepared by sol-gel”, J. Non-Crystalline Solids 353 (2007) 490-493.
  • Rui M. Almeida, Luís F. Santos, Amanda Simens, Ashtosh Ganjoo, Himanshu Jain, “Strucural heterogeneity in chalcogenide glass films prepared by thermal evaporation”, J. Non-Crystalline Solids 353 (2007) 2066-2068.
  • M. Clara Gonçalves, José Brás and Rui M. Almeida, “Process optimization of sol-gel derived colloidal photonic crystals”, J. Sol-Gel Sci. Technol. 42 (2007) 135-143.
  • L.M. Fortes, L.F. Santos, M.C. Gonçalves, Rui M. Almeida, M. Mattarelli, M. Montagna, A. Chiasera, M. Ferrari, A. Monteil, S. Chaussedent, G.C. Righini, “Er3+ ion dispersion in tellurium oxychloride glasses”, Optical Materials 29 (2007) 503-509.
  • A.C. Hannon, D. Di Martino, L.F. Santos, R.M. Almeida, “A model for the Ge-O coordination in germanate glasses”, J. Non-Crystalline Solids 353 (2007) 1688-1694.
  • L.F. Santos, L. Wondraczek, J. Deubener and R.M. Almeida, “Vibrational Spectroscopy Study of Niobium Germanosilicate Glasses”, J. Non-Crystalline Solids 353 (2007) 1875-1881.
  • A.C. Hannon, D. Di Martino, L.F. Santos, R.M. Almeida, “The Ge-O coordination in cesium germanate glasses”, J. Phys. Chemistry B 111 (2007) 3342-3354.
  • S. Koljenovic , T. C. Bakker Schut, R. Wolthuis, A. J. P. E. Vincent, G. Hendriks-Hagevi, L. Santos, J. M. Kros, and G. J. Puppels, “Raman Spectroscopic Characterization of Porcine Brain Tissue Using a Single Fiber-Optic Probe”, Anal. Chem. 79(2) (2007) 557–564.
  • A. Nijssen, K. Maquelin, L.F. Santos, P.J. Caspers, T.C. Bakker Schut, J.C. dan Hollander, H.A.M. Neumann, G.J. Puppels, "Discriminating basal cell carcinoma from perilesional skin using high wave number Raman spectroscopy" Journal of Biomedical Optics 12 (3) (2007) art. no. 034004




    2006


  • Ana C. Marques and Rui M. Almeida, "Raman spectra and structure of multicomponent oxide planar waveguides prepared by sol-gel", J. Sol-Gel Sci. Technol. 40 (2006) 371-378.
  • N.R. Nené, A. Vieira, A.C. Marques, R.M. Almeida, A.R. Ramos, E. Alves and N.P. Barradas, “Analysis of sol-gel silica-titania films doped with Ag and Er using artificial neural networks”, Nuclear Instruments and Methods in Physics Research B249 (2006) 804-807.
  • Luís Fortes, Luís F. Santos, M. Clara Gonçalves and Rui M. Almeida, “The effects of ZnCl2 and ErCl3 on the vibrational spectra and structure of tellurite glasses”, J. Non-Crystalline Solids 352 (2006) 690-694.
  • Rui M. Almeida and Ana C. Marques, “Rare-earth photoluminescence in sol-gel derived confined glass structures”, J. Non-Crystalline Solids 352 (2006) 475-482.



    2005


  • A.R. Ramos, C.P. Marques, E. Alves, A.C. Marques and R.M. Almeida, “Stability of erbium and silver implanted in silica-titania sol-gel films”, Nuclear Instruments and Methods in Physics Research B 240 (2005) 415 – 419.
  • Luís F. Santos, Rolf Wolthuis, S. Koljenovic, Rui M. Almeida and Gerwin J. Puppels, “Fiber-optic Probes for in Vivo Raman Spectroscopy in the High-Wavenumber Region”, Anal. Chem. 77 (2005) 6747 – 6752.
  • M. Matarelli, M. Montagna, A. Chiasera, M. Ferrari, L. Zampedri, G.C. Righini, L.M. Fortes, M.C. Gonçalves, L.F. Santos, R.M. Almeida, “Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses”, Europhys. Lett. 71 (2005) 394 – 399.
  • Rui M. Almeida, Ana C. Marques and Sabine Portal, “Glassy and nanocrystalline photonic materials and structures by sol-gel”, Optical Materials 27 (2005) 1718-1725.
  • Luca Zampedri, Cristiana Tosello, Hervé Portales, Maurizio Montagna, Maurizio Matarelli, Andrea Chiappini, Giancarlo C. Righini, Stefano Pelli, Gualtiero Nunzi Conti, Maurizio Martino, Sabine Portal, Ana C. Marques, Rui M. Almeida, Yoann Jestin, Maurizio Ferrari and Alessandro Chiasera, “Spectroscopic assessment of rare-earth activated planar waveguides and microcavities”, Applied Surface Science 248 (2005) 3-7.
  • A.C. Marques, R.Cabeça, R.M. Almeida, L. Zampedri, A. Chiasera and M. Ferrari, “The effects of TiO2 on the structure and spectroscopic properties of silica-hafnia based sol-gel waveguides”, Glass Technology 46 (2005) 50-54.
  • S. Koljenovic, T.C. Bakker Schut, R. Wolthuis, B. de Jong, L. Santos, P.J. Caspers, J.M. Kros and G.J. Puppels, “Tissue characterization using high wavenumber Raman spectroscopy”, J. of Biomedical Optics 10(3) (2005) 031116.



    2004


  • L.M. Fortes, L.F. Santos, M.C. Gonçalves, R.M. Almeida and F.D’Acapito, “Influence of Er3+ on the early stages of crystallization of chloro-tellurite glasses studied by XRD and EXAFS”, J. Non-Crystalline Solids 348 (2004) 11-16.
  • Sabine Portal and Rui M. Almeida, “Variable incidence infrared absorption spectroscopy of gel-derived silica and titania films”, Physica Status Solidi (a) 201 (2004) 2941-2947.
  • Sabine Portal and Rui M. Almeida, “Rare-earth doped Fabry-Perot microcavities by sol-gel processing”, Proc. SPIE vol. 5360 (2004) 101-111.
  • V.K. Tikhomirov, A.B. Seddon, M. Ferrari, M. Montagna, L.F. Santos and R.M. Almeida, “On a qualitative model for the incorporation of fluoride nano-crystals within an oxide glass network in oxy-fluoride glass-ceramics”, J. Non-Crystalline Solids 337 (2004) 191-195.
  • A.C. Marques, R.M. Almeida, A.R. Ramos and E. Alves, “Compositional profiles in silica-based sol-gel films doped with erbium and silver, by RBS and ERDA”, J. Sol-Gel Sci. Technology 31 (2004) 287-291.
  • R.M. Almeida, A.C. Marques, R. Cabeça, L. Zampedri, A. Chiasera and M. Ferrari, “Photoluminescence of erbium-doped silicate sol-gel planar waveguides”, J. Sol-Gel Sci. Technology 31 (2004) 317-322.
  • Santos, L.F., Vasconcelos, H.C., Barros Marques, M.I. and Almeida, R.M., “Active Nanocrystals in Erbium-doped Silica-Titania Sol-Gel Films”, Mater. Sci. Forum. 455-456 (2004) 545-549.
  • M. Montagna, A.Chiasera, E. Moser, F. Visintainer, M. Ferrari, L. Zampedri, R.R. Gonçalves, S.J.L. Ribeiro, A. Martucci, M. Guglielmi, M. Ivanda and R.M. Almeida, “Nucleation and Crystallization of Titania Nanoparticles in Silica Titania Planar Waveguides: a study by Low Frequency Raman Scattering”, Mater. Sci. Forum. 455-456 (2004) 520-526.
  • R.M. Almeida, A.C. Marques, S. Pelli, G.C. Righini, A. Chiasera, M. Mattarelli, M. Montagna, C. Tosello, R.R. Gonçalves, H. Portales, S. Chaussedent, M. Ferrari and L. Zampedri, “Spectroscopic assessment of of silica-titania and silica-hafnia planar waveguides”, Phil. Mag. 84 (2004) 1659-1666.
  • A.C. Marques, R.M. Almeida, A.R. Ramos and E.Alves, “Study of silica-titania films co-doped with erbium and silver by RBS and ERDA”, Nuclear Instruments and Methods in Physics Research B, 219-220 (2004) 923-927.
  • Rui M. Almeida, M.C. Gonçalves and Sabine Portal, “Sol-Gel Photonic Bandgap Materials and Structures”, J. Non-Crystalline Solids 345&346 (2004) 562-569.



    2003


  • V.K. Tikhomirov, A.B. Seddon, M. Ferrari, M. Montagna, L.F. Santos and R.M. Almeida, “The structure of Er3+-doped oxy-fluoride transparent glass ceramics studied by Raman scattering”, Europhysics Letters 64 (2003) 529-535.
  • A.P. Caricato, M. Fernandez, M. Ferrari, G. Leggieri, M. Martino, M. Mattarelli, M. Montagna, V. Resta, L. Zampedri, R.M. Almeida, L. Fortes, M.C. Gonçalves and L.F. Santos, “Er3+-doped tellurite waveguides deposited by excimer laser ablation”, Mater. Sci. Engr. B 105 (2003) 65-69.
  • Almeida, R.M. and Rodrigues, A.S., “Photonic Bandgap Materials and Structures by Sol-Gel Processing”, J. Non-Crystalline Solids 326&327 (2003) 405-409.
  • Rui M. Almeida and Sabine Portal, “Photonic Bandgap Structures by Sol-gel Processing”, Current Opinion in Sol. State and Mater. Sci. 7 (2003) 151-157.
  • A. Chiasera, M. Montagna, C. Tosello, R.R. Gonçalves, A. Chiappini, M. Ferrari, L. Zampedri, S. Pelli, G.C. Righini, A. Monteil, V. Foglietti, A. Minotti, R.M. Almeida, A. Marques and V. Soares, “Erbium/Ytterbium-activated silica-titania planar and channel waveguides prepared by rf-sputtering”, Proc. SPIE, vol. 4990 (2003) 38-46.
  • Luis M. Fortes, Luis F. Santos, M. Clara Gonçalves and Rui M. Almeida, “Preparation and characterization of Er-doped TeO2-based oxyhalide glasses”, J. Non-Crystalline Solids 324 (2003) 150-158.
  • Ana C. Marques, Rui M. Almeida, Alessandro Chiasera and Maurizio Ferrari, “Reversible photoluminescence quenching in Er3+-doped silica-titania planar waveguides prepared by sol-gel”, J. Non-Crystalline Solids 322 (2003) 272-277.
  • Rui M. Almeida, Ana C. Marques and Maurizio Ferrari, “Optical nanocomposite planar waveguides doped with rare-earth and noble metal elements”, J. Sol-Gel Sci. Technol. 26 (2003) 891-896.



    2002


  • M.C. Gonçalves, Luís F. Santos and R.M. Almeida, “Rare-earth-doped Transparent Glass-Ceramics”, C.R. Chimie 5 (2002) 845-854.
  • Rui M. Almeida and Zhongchun Wang, “Sol-gel preparation of one-dimensional photonic bandgap structures”, Proc. SPIE, vol.4655 (2002) 24-33.
  • Luís F. Santos, H.C. Vasconcelos, M.I. Barros Marques, O.Lyon and R.M. Almeida, “Physical characterization of active nanocrystals in erbium-doped silica-titania nanocomposite sol-gel films”, Key Engineering Mater. 230-232 (2002) 644-647.
  • Almeida, R.M., Santos, L.F., and Di Martino, D., “The germanate anomaly in sodium and cesium binary glass systems: a comparison”, Phys. Chem. Glasses 43C (2002) 85-89.
  • D. Di Martino, L.F. Santos and R.M. Almeida, “X-ray photoelectron spectroscopy of alkali germanate glasses”, Surface and Interface Analysis 34 (2002) 324-327.
  • Rui M. Almeida, “Materials for integrated optics”, in: Micro-optoelectronics: Materials, Devices and Integration, Quaderni di Ottica e Fotonica 8 (2002) 81.
  • R. Trbojevitch, N. Pellegri, A. Frattini, O. de Sanctis, P.J. Morais and R. M. Almeida, “Preparation and isolation of gold nanoparticles coated with a stabilizer and sol-gel compatible agent”, J. Mater. Res. 17 (2002) 1973-1980.
  • José P. Rainho, Martyn Pillinger, Luís D. Carlos, Sidney J.L. Ribeiro, Rui M. Almeida and João Rocha, “Local Er(III) environment in luminescent titanosilicates prepared from microporous precursors”, J. Mater. Chem. 12 (2002) 1162.
  • Rui M. Almeida, Paulo J. Morais and Ana C. Marques, “Planar waveguides for integrated optics prepared by sol-gel methods”, Phil. Mag. B82 (2002) 707-719.
  • J. Gallardo, A. Duran, D. di Martino and Rui M. Almeida, “Structure of Inorganic and Hybrid sol-gel coatings studied by variable incidence infrared spectroscopy”, J. Non-Crystalline Solids 298 (2002)219-225.



    Books


  • R.M. Almeida, editor of Vol. 2 of the Handbook of Sol-Gel Science and Technology, “Characterization and Properties of Sol-Gel Materials and Products”, Kluwer Academic Publishers (London, 2005).
  • R.M. Almeida, editor of Vol. 25, Issue 2 (March 2004) of Optical Materials (pp. 101-241).
  • Rui M. Almeida, “Fibras Ópticas”, in: Fortes, M.A. and Ferreira, P. (eds.), Materiais do Século XX, IST Press (Lisboa, 2003), pp. 319-326.
  • R.M. Almeida, J. Xu, Sol-Gel Processing of Sulfide Materials, in: Handbook of Sol-Gel Science and Technology, Vol. 1, ed. H. Kozuka, Kluwer Academic Publishers (London, 2005), pp. 225-244.
  • R.M. Almeida, A.C. Marques, Characterization of Sol-Gel Materials by Infrared Spectroscopy, in: Handbook of Sol-Gel Science and Technology, Vol. 2, ed. R.M. Almeida, Kluwer Academic Publishers (London, 2005), pp. 65-90.
  • R.M. Almeida, M. Clara Gonçalves, Sol-Gel Derived Photonic Bandgap Structures, in: Photonic Glasses, ed. R. Balda, Research Signpost (Kerala, India, 2006), pp. 67-88.

    Projects


  • LASARTE - Laser Technology in Pictorial Materials, funded by AdI - Agência de Inovação (PRIME - IDEIA program), with Instituto de Soldadura e Qualidade and CaCO3 (company). (Rui M. Almeida, PI).

  • New nanocrystalline glass ceramics in the (Ge,Te,Si)O2-Nb2O5 - (Na,K,Rb)2O system (FCT, PTDC/CTM/64235/2006), with INESC-Porto. (Luís F. Santos, PI).

  • PORSCAF - Sol-gel derived scaffolds for bone tissue regeneration with a hierarchical pore structure (FCT, PTDC/CTM/66712/2006), with the Faculty of Veterinarian Medicine (Lisboa). (Rui M. Almeida, PI).

  • Coordination action EFONGA - European Forum on New Glass Applications (Contract nº NMP3-CT-2005-013983, FP6, DG Research), with the members of the Technical Committee TC-16 of ICG (International Commission on Glass, on "Nanostructured Glasses"). (Rui M. Almeida, PI).

  • International Materials Institute for New Functionality in Glass, IMI-NFG, sponsored by the US National Science Foundation (2004-2008), where R.M. Almeida is a member of the International Board of Advisors.

  • GRICES-CNR collaborative project (2007-2008), with the University of Trento (Italy). M. Clara Gonçalves, PI).

    Collaborations


  • Lehigh University (USA), Department of Materials Science and Engineering - Prof. Himanshu Jain.

  • Trento University (Italy), Department of Physics - Dr. Maurizio Ferrari and Prof. Maurizio Montagna.

  • Technische Universität Clausthal (Germany), Institut für Nichtmetallische Werkstoffe - Prof. Joachim Deubener.

  • Federal University of S. Carlos (SP, Brazil), Department of Materials Engineering - Prof. Edgar D. Zanotto and Prof. Ana C. Rodrigues.

  • University of Porto (Portugal), Department of Physics - Prof. A. Pereira Leite and Prof. Paulo Marques.

  • INM - Leibnitz Institute for New Materials (Saarbruecken, Germany), Department of Coating Technology - Dr. Joerg Puetz.