High Q light-emitting Si-rich Si3N4 microdisks


AU: 
Lupi, FF; Navarro-Urrios, D; Monserrat, J; Dominguez, C; Pellegrino, P; Garrido, B
SO: 
OPTICS LETTERS
Autors del GTQ: 
VL: 
36
IS: 
8
BP: 
1344
EP: 
1346
PY: 
2011
SN: 
0146-9592
Impact: 
3.32
Any IF: 
2010
Resum: 

We report on the optical properties of active silicon (Si)- rich Si3N4 microdisk cavities in the visible range. We have studied the correlation between the quality (Q) factor of the cavities and the active material deposition parameters. Microphotoluminescence measurements revealed subangstrom whispering galley modes resonances and a maximum Q of 10(4) around 760nm. These values improve significantly the best results reported so far for Si-based lightemitting circular resonators in the visible range. In contrast to what is reported for Si-rich SiO2-based microcavities, we demonstrate the absence of a spectral widening at high pump fluxes associated to carrier absorption mechanisms, which allows high emitted power without degrading the Q of the cavity. These results open the route toward the monolithic integration of those structures into more complex circuits including Si photodetectors.

DT: 
Article en revistes indexades
Percentil: 
HIGH
Any Percentil: 
2010
Categoria: 
OPTICS