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6. Clear-PEM: Monte Carlo performance and image reconstruction studies

Author

Trindade, A., primary, Almeida, P., additional, Balau, F., additional, Ferreira, N., additional, Fetal, S., additional, Fraga, F., additional, Martins, M., additional, Matela, N., additional, Mendes, P., additional, Moura, R., additional, Ortigao, C., additional, Peralta, L., additional, and Ribeiro, R., additional

Published
2003
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7. Overview of Geant4 applications in medical physics

Author

Archambault, L., primary, Beaulieu, L., additional, Carrier, J.F., additional, Castrovillari, F., additional, Chauvie, S., additional, Foppiano, F., additional, Ghiso, G., additional, Guatelli, S., additional, Incerti, S., additional, Lamanna, E., additional, Larsson, S., additional, Lopes, M.C., additional, Peralta, L., additional, Pia, M.G., additional, Rodrigues, P., additional, Tremblay, V.H., additional, and Trindade, A., additional

Published
2003
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10. Control of Center Wavelength in Reflective-Arrayed Waveguide-Grating Muitiplexers.

Author

de Peralta, L. Grave, Bernussi, Ayrton A., Gorbounov, V., Berg, J. M., and Temkin, H.

Subjects
*WAVEGUIDES, *MULTIPLEXING, *SILICA, *FINITE element method, *ELECTRIC waves, *TELECOMMUNICATION
Abstract

A new approach to compensate for the channel-wave- length shift due to fabrication errors and thermal effects in arrayed waveguide-grating multiplexers is described. The method combines a silica-based reflective multiplexer with a composite mirror made of materials with different coefficients of thermal expansion. Differential thermal expansion of the mirror assembly rotates its reflecting surface at a constant rate with temperature, compensating for the temperature-induced changes in the effective index of refraction of the waveguide material. The use of external mirror also allows for wavelength trimming that centers the channel wavelength at the standard grid. The channel wave- length can be tuned by up to 2 nm without increased insertion loss or changes in channel-to-channel separation. The channel wavelength shifts linearly with the external mirror angle at a rate of ∼ 66 nm/deg in excellent agreement with simulation. A finite element analysis of the composite mirror shows negligible deformation of the reflecting surface over a wide range of temperatures, in good agreement with experimental results. [ABSTRACT FROM AUTHOR]

Published
2004
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11. Silicon-Dioxide Waveguides With Low Birefringence.

Author

de Peralta, L. Grave, Bernussi, Ayrton A., Temkin, H., Borhani, Marcus M., and Doucette, David E.

Subjects
*OPTICAL waveguides, *SILICA, *DOUBLE refraction
Abstract

We describe the use of highly boron-doped silicon dioxide for the preparation of optical waveguides with very low birefringence. Plasma-enhanced chemical vapor deposition was used to vary the boron content from 5 wt% to 10 wt%, at a constant phosphorus content of 4.8%. A transition from compressive to tensile stress was observed at a boron concentration of 9.1%. Pedestal-type waveguides formed with the high-boron top cladding layer show low loss of 0.02 dB/cm. Arrayed waveguide grating devices with a polarization-dependent wavelength shift of 0.01 nm and excellent stability have been demonstrated. [ABSTRACT FROM AUTHOR]

Published
2003
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13. Performance of the DELPHI small angle tile calorimeter.

Author

Alvsvaag, S.J., Macland, O.A., Klovning, A., Benvenuti, A.C., Giordano, V., Guerzoni, M., Navarria, F.L., Perrotta, A., Camporesi, T., Obraztsov, V., Paganoni, M., Vallazza, E., Bozzo, M., Cereseto, R., Barreira, G., Espirito Santo, M.C., Maio, A., Onofre, A., Peralta, L., and Pimenta, M.

Published
1996
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15. The DELPHI small angle tile calorimeter.

Author

Alvsvaag, S.J., Maeland, O.A., Klovning, A., Benvenuti, A.C., Giordano, I., Guerzoni, M., Navarria, F.L., Verardi, M.G., Camporesi, T., Vallazza, E., Bozzo, M., Cereseto, R., Barreira, G., Espirito Santo, M.C., Maio, A., Onofre, A., Peralta, L., Pimenta, M., Tome, B., and Carling, H.

Published
1995
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16. Generation of Arbitrary Sequences of Ultrafast Pulses With Integrated-Optic Space-to-Time Optical Processors and Phase-Only Masks.

Author

Krishnan, A., Grave de Peralta, L., Kuryatkov, V., Temkin, H., and Bernussi, A. A.

Abstract

We report a new approach to the generation of arbitrary sequences of ultrafast pulses using an integrated optics space-to-time optical processor. The processor combines a reflective arrayed waveguide grating multiplexer with a phase-only mask containing sets of pixels of constant phase separated by sets of pixels with phases alternating between 0 and pi rad [ABSTRACT FROM PUBLISHER]

Published
2007
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17. Performance of the upgraded small angle tile calorimeter at LEP

Author

Alvsvaag, S.J., primary, Bari, M., additional, Barreira, G., additional, Benvenuti, A.C., additional, Bigi, M., additional, Bonesini, M., additional, Bozzo, M., additional, Camporesi, T., additional, Carling, H., additional, Cassio, V., additional, Castellani, L., additional, Cereseto, R., additional, Chignoli, F., additional, Della Ricca, G., additional, Dharmasiri, D.R., additional, Espirito Santo, M.C., additional, Falk, E., additional, Fenyuk, A., additional, Ferrari, P., additional, Gamba, D., additional, Giordano, V., additional, Gouz, Yu., additional, Guerzoni, M., additional, Gumenyuk, S., additional, Hedberg, V., additional, Jarlskog, G., additional, Karyukhin, A., additional, Klovning, A., additional, Konoplyannikov, A., additional, Kronkvist, I., additional, Lanceri, L., additional, Leoni, R., additional, Maeland, O.A., additional, Maio, A., additional, Mazza, R., additional, Migliore, E., additional, Navarria, F.L., additional, Nossum, B., additional, Obraztsov, V., additional, Onofre, A., additional, Paganoni, M., additional, Pegoraro, M., additional, Peralta, L., additional, Petrovykh, L., additional, Pimenta, M., additional, Poropat, P., additional, Prest, M., additional, Read, A.L., additional, Romero, A., additional, Shalanda, N., additional, Simonetti, L., additional, Skaali, T.B., additional, Stugu, B., additional, Terranova, F., additional, Tome, B., additional, Torassa, E., additional, Trapani, P.P., additional, Verardi, M.G., additional, Vallazza, E., additional, Vlasov, E., additional, and Zaitsev, A., additional

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18. Analog tests of the new ISPA-tube readout system

Author

Abreu, M.C., primary, Cencelli, V., additional, Cindolo, F., additional, D'Abramo, E., additional, D'Ambrosio, C., additional, De Notaristefani, F., additional, Hull, G., additional, Leutz, H., additional, Peralta, L., additional, Mendes, P.R., additional, Rosso, E., additional, and Sousa, P., additional

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19. Geant4 low energy electromagnetic physics

Author

Chauvie, S., primary, Guatelli, S., additional, Ivanchenko, V., additional, Longo, F., additional, Mantero, A., additional, Mascialino, B., additional, Nieminen, P., additional, Pandola, L., additional, Parlati, S., additional, Peralta, L., additional, Pia, M.G., additional, Piergentili, M., additional, Rodrigues, P., additional, Saliceti, S., additional, and Trindade, A., additional

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20. Imaging photonic Bloch functions with plasmon-coupled leakage radiation.

Author

Regan, C. J., Thiabgoh, O., Rodriguez, R., de Peralta, L. Grave, and Bernussi, A. A.

Abstract

We report results on imaging photonic Bloch wavefunctions in plasmonic crystals using plasmon-coupled leakage radiation. The surface images of the crystals are the result of an incoherent superposition of photonic Bloch wavefunctions. [ABSTRACT FROM PUBLISHER]

Published
2012

21. Far-field superlenses based on plasmon tomography.

Author

de Peralta, L. Grave, Rodriguez, R., Regan, C. J., and Bernussi, A. A.

Abstract

Superlenses were fabricated by patterning a dye-doped dielectric layer deposited over a thin film of gold and plasmon-tomography was used for imaging. Nanofeatures with lateral dimensions smaller than λ/20 were visible in the images. [ABSTRACT FROM PUBLISHER]

Published
2012

23. Geant4 low energy electromagnetic physics.

Author

Chauvie, S., Guatelli, S., Ivanchenko, V., Longo, F., Mantero, A., Mascialino, B., Nieminen, P., Pandola, L., Parlati, S., Peralta, L., Pia, M.G., Piergentili, M., Rodrigues, P., Saliceti, S., and Tnndade, A.

Published
2004
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