| Authors: | I. Moreels, B. De Geyter, D. Van Thourhout, Z. Hens | | Title: | Transmission of a quantum-dot-silicon-on-insulator hybrid notch filter | | Format: | International Journal | | Publication date: | 6/2009 | | Journal/Conference/Book: | Journal of the Optical Society of America B-Optical Physics
| | Editor/Publisher: | Optical Society of America, | | Volume(Issue): | 26(6) p.1243-1247 | | DOI: | 10.1364/josab.26.001243 | | Citations: | 7 (Dimensions.ai - last update: 29/12/2024)
6 (OpenCitations - last update: 3/5/2024)
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Abstract
Colloidal PbS and PbSe quantum dots are mixed with polystyrene and spincoated on top of a silicon-on-insulator microring notch filter. We demonstrate that the light propagating through the ring resonator strongly interacts with the quantum-dot doped thin film. This allows us to efficiently tune the output of the notch filter by varying the quantum-dot size and concentration. As a result, the hybrid devices can exhibit critical coupling only for a single resonance or display a constant extinction ratio over a wide spectral range. Considering the promising nonlinear optical properties of colloidal quantum dots, our results open new pathways for all-optical signal processing applications on a silicon platform. Related Research Topics
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