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Colloidal semiconductor quantum dots: From synthesis to photonic applications

par Moreels, Iwan;Kockaert, Pascal ;Geyter, B.;Thourhout, D.;Hens, Zeger
Référence , page (191-194)
Publication Publié, 2008

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Résumé :

Interest in semiconductor colloidal nanocrystals has grown considerably due to the many advantages they offer. In this paper, we focus on the nonlinear refractive index n2 and nonlinear absorption aNL of near-infrared PbS and PbSe nanocrystals (Q-PbS(e)), and their interaction with Silicon-on-Insulator (SOI) ring resonators. We first demonstrate that Q-PbS(e) have a negative n2, in combination with absorption saturation. We then show that by depositing these nanocrystals as a thin film on SOI rings, the ring resonances can be strongly influenced by the nanocrystals. Both results hold considerable promise for the further investigation of hybrid SOI devices.