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| 1 | Diagnostic techniques for photonic materials based on Raman and Brillouin spectroscopies显示文摘The elastic and vibrational properties of a material,bulk or planar waveguide,are studied by Brillouin and Raman spectroscopy to follow the process of nanocrystals growth in glass-ceramics. The nanoparticles cause the appearance,in the low fre-quency Raman spectrum,of characteristic peaks,whose position depends on the size of the crystals. At the same time,sharp crystal peaks,due to optical phonons,appear in the Raman spectra,allowing the determination of the nucleated phase,and a frequency shift of the Brillouin peaks is observed. | M. Mattarelli S.Caponi A. Chiappini M. Montagna E. Moser F. Rossi C.Tosello C. Armellini A. Chiasera M. Ferrari Y. Jestin G. Nunzi Conti S. Pelli G.C. Righini | 2007 | Optoelectronics Letters2007，3，3： | 11 |
| 2 | Reproducibility of splicer-based long-period fiber gratings for gain equalization显示文摘We fabricated long-period fiber gratings(LPFGs) using electric arc discharges. We observed that the fiber becomes slightly tapered due to longitudinal tension during the arc:this effect depends on the arc current and time length. We experimentally investigated how these characteristics can influence grating's performances,especially in view of employing the LPFG as gain equalizer for an erbium-doped optical amplifier. As expected,we found that the spectral response of the grating depends on the period Λ,the intensity of the perturbation,the grating length and the type of mode-coupling induced. Since this last parameter cannot be estimated directly from the transmission spectra,we propose a method to determine the mode-coupling occurring in the device and to assess the index modulation induced by the electric arcs. This method combines both experimental and simulated data,and can be used to characterize LPFGs made-up by any method. | I. Cacciari M. Brenci R. Falciai G. Nunzi Conti S. Pelli G. C. Righini | 2007 | Optoelectronics Letters2007，3，3： | 2 |
| 3 | Er^(3+)-activated silica inverse opals synthesized by the solgel method显示文摘We present the details of the sol-gel processing used to realize inverse silica opal,where the silica was activated with 0.3 mol% of Er3+ ions. The template(direct opal) was obtained assembling polystyrene spheres of the dimensions of 260 nm by means of a vertical deposition technique. The Er3+-activated silica inverse opal was obtained infiltrating,into the void of the template,the silica sol doped with Er3+ ions and subsequently removing the polystyrene spheres by means of calcinations. Scanning electron microscope showed that the inverse opals possess a fcc structure with a air hollows of about 210 nm and a photonic band gap,in the visible range,was observed from reflectance measurements. Spectroscopic properties of Er3+-activated silica inverse opal were investigated by luminescence spectroscopy,where,upon excitation at 514.5 nm,an emission of 4I13/2 → 4I15/2 of Er3+ ions transition with a 21 nm bandwidth was observed. Moreover the 4I13/2 level decay curve presents a single-exponential profile,with a measured lifetime of 18 ms,corresponding a high quantum efficiency of the system. | 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 R. M. Almeida G. C. Righini | 2007 | Optoelectronics Letters2007，3，3： | 2 |
| 4 | Er3+/Yb3+ Co-Activated Silica-Alumina Monolithic Xerogels显示文摘 | A. Chiasera M. Montagna R. Rolli S. Ronchin S. Pelli G.C. Righini R.R. Gon?alves Y. Messaddeq S.J.L. Ribeiro C. Armellini M. Ferrari L. Zampedri | 2003 | Journal of Sol - Gel Science and Technology (-)2003，，1： | 1 |
| 5 | microRNA-containing T regulatory cell-derived exosomes suppress pathogenic T helper 1 cells显示文摘 | Isobel S. Okoye Stephanie M. Coomes Victoria S. Pelly Stephanie Czieso Venizelos Papayannopoulos Tanya Tolmachova Miguel C. Seabra Mark S. Wilson | 2014 | Immunity2014，，： | 1 |
| 6 | Er-doped silica-based waveguides prepared by different techniques: RF-sputtering, sol-gel and ion-exchange显示文摘 | G.C. Righini S. Pelli M. Ferrari C. Armellini L. Zampedri C. Tosello S. Ronchin R. Rolli E. Moser M. Montagna A. Chiasera S.J.L. Ribeiro | 2002 | Optical and Quantum Electronics2002，，12： | 1 |
| 7 | Hepatobiliary Alterations in Patients with Inflammatory Bowel Disease: A Multicenter Study显示文摘 | G. RIEGLER R. D’INCà G. C. STURNIOLO G. CORRAO C. DEL VECCHIO BLANCO V. DI LEO R. CARRATù M. INGROSSO M. A. PELLI S. MORINI D. VALPIANI D. CANTARINI P. USAI C. PAPI R. CAPRILLI | 1998 | Scandinavian Journal of Gastroenterology1998，，1： | 1 |
| 8 | Preparation and characterization of ZnO particles embedded in organic–inorganic planar waveguide by sol–gel route显示文摘 | A. Chiappini C. Armellini A. Chiasera M. Ferrari R. Guider Y. Jestin L. Minati E. Moser G. Nunzi Conti S. Pelli R. Retoux G.C. Righini G. Speranza | 2009 | Journal of Non-Crystalline Solids2009，，18： | 1 |
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