Enhanced stimulated Raman scattering in silicon nanocrystals embedded in silicon-rich nitride/silicon superlattice structures

Data di pubblicazione: 22 Dic 2008

RivistaFonte dati: OPENALEXTipo OpenAlex: articleAccesso chiuso
Autori: Luigi Sirleto, Maria Antonietta Ferrara, Ivo Rendina, Soumendra Nath Basu, Joe Warga, Ronglian Li, Luca Dal Negro

In this paper, we report on the observation of stimulated Raman scattering in amorphous silicon nanocrystals embedded in Si-rich nitride/silicon superlattice structures (SRN/Si-SLs). In particular, we have experimentally demonstrated amplification of Stokes signal up to 0.9dB∕cm at 1540.6nm using a 1427nm continuous-wavelength pump laser, consistent with a preliminary valuation of approximately a fourfold enhancement of the gain coefficient in Raman amplifier based on SRN/Si-SLs with respect to silicon. Finally, a significant reduction in threshold power of about 40% is also reported. Our findings indicate that silicon nanocrystals embedded in Si nitride-based superlattice structures show great promise for Si-based Raman lasers.

Editore
American Institute of Physics
Fonte
Applied Physics Letters
Volume
93
Fascicolo
25
Citazioni
32
ID archivio
f6bd1eb2c85e2027ff36f5e6fa3b65e5
Riferimenti
Volume: 93 Issue: 25 Pages: 251104