.Diagnostic techniques for photonic materials based on Raman and Brillouin spectroscopies[J].Optoelectronics Letters,2007,3(3):188-191 Diagnostic techniques for photonic materials based on Raman and Brillouin spectroscopies 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 [1]Dipartimento di Fisica, Universita di Trento CSMFO group, Trento, Italy [2]INFM CRS-SOFT, c/o Universita＇ di Roma ＂La Sapienza ＂, 1-00185, Roma, Italy [3]CNR- IFN, Istituto di Fotonica e Nanotecnologie, CSMFO group, Trento, Italy. [4]Photonic Materials and Devices Laboratory, IFAC - CNR, Sesto Fiorentino, Italy [5]CNR, Department of Materials and Devices, Roma, Italy Abstract:       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 frequency 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. Hits: 3604 Download times: 214 View Full Text    Download reader