کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1484263 | 991626 | 2008 | 4 صفحه PDF | دانلود رایگان |
Resonant Raman effects are studied for CdSxSe1−x nanoparticles in a silicate glass matrix in order to explore new possibilities of Raman amplification for telecommunication fibers. Nanoparticles with diameters ranging from less than 2 nm up to 6 nm are excited with the 458 nm, 488 nm and 633 nm laser lines corresponding both to resonance and off-resonance conditions. Due to confinement effects the resonance conditions are achieved at a given frequency by varying the size of the nanoparticles. In resonance no enhancement is observed for the silicate glass matrix but the (1LO-CdS), (2LO-CdS), (1LO CdSe + 1 LO CdS) modes are strongly enhanced showing the possibility of resonant Raman amplification of the discrete frequencies of the LO modes and of their overtones.
Journal: Journal of Non-Crystalline Solids - Volume 354, Issue 29, 1 July 2008, Pages 3458–3461