Photoluminescence of silicon nano-clusters functionalized microtoroids

Yves Candéla (1) , Jean-Baptiste Jager (2) , R.P. Nalini (3) , Guoping Lin (1) , M. Terrier (2) , Vincent Calvo (4) , Fabrice Gourbilleau (3) , Jean Hare (1)

1 LKB (Lhomond) - Laboratoire Kastler Brossel
2 SP2M - UMR 9002 - Service de Physique des Matériaux et Microstructures
3 NIMPH - Nanomatériaux, Ions et Métamatériaux pour la Photonique
4 DRFMC - Département de Recherche Fondamentale sur la Matière Condensée

We report on the first realization of on-chip toroid microcavities embedding size-controlled silicon nanoclusters (Si-nc), produced by reactive magnetron co-sputtering. We demonstrate functionalized whispering gallery microresonators with low volume and high quality factor. Emission properties are optimized by tailoring the size and the shape of the toroids and the Si-nc distribution. Coalescence of Si-nc during the melting of the toroid is minimized by the design of the microdisk preforms. Photolumines- cence in the whispering gallery modes of 13:5 m diameter microtoroids, is observed in both near-field and far-field.

Mots clés: (140.3945) Microcavities; (160.4236) Nanomaterials; (060.2280) Fiber design and fabrication; (300.6280) Spectroscopy; fluorescence and luminescence; (350.3950) Micro- optics

Domaines: Optique / photonique

Yves Candéla, Jean-Baptiste Jager, R.P. Nalini, Guoping Lin, M. Terrier, et al.. Photoluminescence of silicon nano-clusters functionalized microtoroids. 2013. ⟨hal-01005817⟩