Publications
390 results found
Roberts DA, Syms PRA, Holmes AS, et al., 1999, Dual numerical aperture confocal operation of moving fibre bar code reader, ELECTRONICS LETTERS, Vol: 35, Pages: 1656-1658, ISSN: 0013-5194
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- Citations: 9
Forastiere MA, Guglielmi M, Martucci A, et al., 1999, <title>Strip-loaded sol-gel waveguides for optical amplifiers</title>, Optoelectronics '99 - Integrated Optoelectronic Devices, Publisher: SPIE, ISSN: 0277-786X
Yeatman EM, Ahmad MM, McCarthy O, et al., 1999, Optical gain in SiO2-TiO2 waveguides fabricated by the sol-gel technique, Optics Communications, Vol: 164, Pages: 19-25
Roberts DA, Syms RRA, Holmes AS, et al., 1999, Dual numerical aperture confocal operation of a moving fibre bar-code reader, Electronics Letters, Vol: 35, Pages: 1656-1657
Forastiere MA, Guglielmi M, Ahmad MM, et al., 1999, Strip-loaded sol-gel waveguides for optical amplifiers, Proc. SPIE 3622, Pages: 129-437
Roberts DA, Syms RRA, Holmes AS, et al., 1999, Dual numerical aperture confocal operation of a moving fibre bar-code reader, Electronics Letters, Vol: 35, Pages: 1656-1657
Orignac X, Barbier D, Du XM, et al., 1999, Sol-gel Silica/Titania-on-silicon Er/Yb-doped waveguides for optical amplification at 1.5 um, Optical Materials, Vol: 12, Pages: 1-18
Guglielmi M, Martucci A, Almeida RM, et al., 1998, Spinning deposition of silica and silica-titania optical coatings: A round robin test, JOURNAL OF MATERIALS RESEARCH, Vol: 13, Pages: 731-738, ISSN: 0884-2914
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- Citations: 6
Guglielmi M, Martucci A, Almeida RM, et al., 1998, Spinning deposition of silica and silica-titania optical coatings: A round robin test, Journal of Materials Research, Vol: 13, Pages: 731-738, ISSN: 0884-2914
A round robin test has been performed on sol-gel processing for the deposition of silica and silica-titania films on silicon substrates by spin-coating. Three solution preparation processes for silica coatings and three for silica-titania coatings were used to prepare samples at each of the participating laboratories. The films have been characterized mainly by thickness (profilometry and ellipsometry measurements), refractive index, porosity, and optical scattering. Different processes gave different thicknesses. Thickness differences were found in films prepared by the same process and by the same deposition parameters, but in different laboratories, when heat-treated at 500°C. Variations were reduced in samples annealed at 1000°C. Refractive index and porosity measurements suggest that variations were due to structural differences, particularly porosity. Furthermore, films heat-treated at 500°C were not completely stabilized, and showed index and porosity variations after six months.
Zai MHM, Yeatman EM, 1998, Solution deposition and electrical characterisation of thin PZT films on Pt/Ti/SiO<sub>2</sub>/Si substrates, Workshop on Growth and Processing of Materials for Electronics at Materials Congress 98, Publisher: INST MATERIALS, Pages: 65-72
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- Citations: 1
McCarthy O, Yeatman EM, 1998, Control of dopant adsorption from aqueous solution into nanoporous sol-gel films, JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, Vol: 13, Pages: 579-584, ISSN: 0928-0707
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- Citations: 4
Horowitz F, Michels AF, Yeatman EM, 1998, Optical viscometry of spinning sol coatings, JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, Vol: 13, Pages: 707-712, ISSN: 0928-0707
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- Citations: 9
Pellegri N, Dawnay EJC, Yeatman EM, 1998, Multilayer SiO<sub>2</sub>-B<sub>2</sub>O<sub>3</sub>-Na<sub>2</sub>O films on Si for optical applications, JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, Vol: 13, Pages: 783-787, ISSN: 0928-0707
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- Citations: 6
McCarthy O, Yeatman EM, 1997, Selective-area doping of porous solgel films for integrated optics, OPTICS LETTERS, Vol: 22, Pages: 1864-1866, ISSN: 0146-9592
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- Citations: 3
Yeatman EM, 1997, Sol-gel fabrication for optical communication components: Prospects and progress, Pages: 119-142, ISSN: 0277-786X
The possible use of sol-gel films and monoliths for optical guided wave components is receiving increasing attention. This paper describes the requirements for such components in fibre communication systems, and reviews the status of the principal integrated optical technologies which compete for these applications. The development of waveguides based on sol-gel, and on sol-gel materials relevant to integrated optics, is reviewed. The issues relating to the future success of sol-gel in this field, i.e. cost, performance and functionality, are discussed, and some areas of current and future work described. Key challenges to competitive success identified.
Dawnay EJC, Fardad MA, Green M, et al., 1997, Growth and characterization of semiconductor nanoparticles in porous sol-gel films, Journal of Materials Research, Vol: 12, Pages: 3115-3126
Horowitz F, Dawnay EJC, Fardad MA, et al., 1997, Towards better control of sol-gel film processing for optical device applications, Journal of Nonlinear Optical Physics and Materials, Vol: 6, Pages: 1-18
Yeatman EM, Pita K, Ahmad MM, et al., 1997, Strip -Loaded High Confinement Waveguides for photonic Applications, Accepted for publication in Journal of Sol-Gel Science and Technology
Horowitz F, Dawnay EJC, Fardad MA, et al., 1997, Towards better control of sol-gel film processing for optical device applications, Journal of Nonlinear Optical Physics and Materials, Vol: 6, Pages: 1-18
Yeatman EM, Dawnay EJC, 1997, Doped sol-gel films for silica-on-silicon photonic components, 8th International Workshop on Glasses and Ceramics from Gels, Publisher: KLUWER ACADEMIC PUBL, Pages: 1007-1011, ISSN: 0928-0707
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- Citations: 18
Dawnay EJC, Fardad MA, Green M, et al., 1997, Growth and characterization of semiconductor nanoparticles in porous sol-gel films, Journal of Materials Research, Vol: 12, Pages: 3115-3126
Yeatman EM, Pita K, Ahmad MM, et al., 1997, Strip -Loaded High Confinement Waveguides for photonic Applications, Accepted for publication in Journal of Sol-Gel Science and Technology
Yeatman EM, 1997, Actuation Mechanisms for Micromechanics, Diffractive Optics and Optical Microsystems, Publisher: Springer US, Pages: 209-221, ISBN: 9781489914767
Horowitz F, Bacchieri A, Michels A, et al., 1996, Real-time interferometric analysis of spinning liquid films, Pages: 164-167, ISSN: 0277-786X
Optical interferometric monitoring of spin coating (optospinography) has allowed close observation of a thin liquid film temporal evolution (at 500-2500 rpm, 100 Hz data acquisition), from which its kinematic viscosity can be determined. The data obtained from this procedure is in good agreement with known values for two oil standards, indicating that the method is valid in the range of approx. 0.4 to 150 Stokes. Advantages and limitations are discussed.
Yeatman EM, 1996, Resolution and sensitivity in surface plasmon microscopy and sensing, Artifical Biosensing Interfaces (ABI) Workshop No 2 - Surface Characterization and Optical Sensing Methods in Biosensors, Publisher: ELSEVIER ADVANCED TECHNOLOGY, Pages: 635-649, ISSN: 0956-5663
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- Citations: 138
Fardad MA, Yeatman EM, Dawnay EJC, et al., 1996, Fabrication and Characterisation of a CDS-Doped Silica-on-silicon Planar Waveguide, IEE Proc.Optoelectronics, Vol: 143, Pages: 298-302
Fardad MA, Yeatman EM, Dawnay EJC, et al., 1996, Fabrication and Characterisation of a CDS-Doped Silica-on-silicon Planar Waveguide, IEE Proc.Optoelectronics, Vol: 143, Pages: 298-302
Green M, Dawnay EJC, Yeatman EM, 1996, Mesoscopic Semiconductor Crystallites in Planar Waveguide Structure, UK-Japan Workshop on Mesoscopic Electronics, 1996 Kamakura, Japan
Green PW, Syms RRA, Yeatman EM, 1995, Demonstration of three-dimensional microstructure self-assembly, JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, Vol: 4, Pages: 170-176, ISSN: 1057-7157
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- Citations: 86
Fardad MA, Yeatman EM, Dawnay EJC, et al., 1995, Effects of H<inf>2</inf>O on structure of acid-catalysed SiO<inf>2</inf> sol-gel films, Journal of Non-Crystalline Solids, Vol: 183, Pages: 260-267, ISSN: 0022-3093
Thin silica films were deposited on silicon wafers by the sol-gel technique, using spin coating. The sols were prepared by HCl catalysis of tetraethylorthosilicate (TEOS) diluted in ethanol, using different molar ratios, R, of H2O:TEOS. The films were then baked at various temperatures, and characterised using ellipsometry, profilometry, optical scattering and infrared spectroscopy. It was found that the thickness, shrinkage, porosity and pore sizes all decrease with increasing R. It was also found that high water levels yield films of higher homogeneity and finer texture, and less tensile stress. © 1995.
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