Waveguide cores containing silicon nanocrystals as active spectral filters for silicon-based photonics

Layers of densely packed luminescent Si nanocrystals embedded in fused silica act as wavelength-specific planar waveguides that filter the wide-band spontaneous emission. The waveguides' light output consists of two spectrally narrow (~10 nm), orthogonally polarized, and spatially directed band...

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Veröffentlicht in:Applied physics. B, Lasers and optics Lasers and optics, 2006-04, Vol.83 (1), p.87-91
Hauptverfasser: PELANT, I, OSTATNICKY, T, VALENTA, J, LUTEROVA, K, SKOPALOVA, E, MATES, T, ELLIMAN, R. G
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Sprache:eng
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Zusammenfassung:Layers of densely packed luminescent Si nanocrystals embedded in fused silica act as wavelength-specific planar waveguides that filter the wide-band spontaneous emission. The waveguides' light output consists of two spectrally narrow (~10 nm), orthogonally polarized, and spatially directed bands. This effect is shown to result from leaky modes of the lossy waveguides. The results have general applicability to lossy, asymmetric waveguides and show the way to produce spectrally narrow emission without the use of optical cavities.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-005-2118-5