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Existing infrared-emitting, solution-processed waveguides are made by embedding nanocrystal quantum dots in sol-gel waveguides. The fabrication of such waveguides is complex, and results in a less intense optical light source. The marketplace, however, demands that solution-based photonics be simple and economical in order to thrive. There is hence a need for simpler, efficient, infrared-emitting nanocrystal waveguides.This thesis describes a simple room-temperature processing step that can double photoluminescence quantum efficiency in solution while enabling the fabrication of thicker, smoother, more uniform planar waveguides. This process is used to demonstrate the fabrication of matrix-free nanocrystal waveguides emitting in the near-infrared with > 5% photoluminescence quantum efficiency. These waveguides exhibit low-loss (∼5-10 cm -1) due to low surface roughness (< 10 nm), and are fabricated as both single- and multi-mode planar structures. A demonstration of waveguiding in corrugated structures is also made. These results reveal the feasibility of solution-based photonics in the infrared.
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Low-loss waveguides made from solution-processed infrared-emitting semiconductor quantum dots.
2005
in English
0494072482 9780494072486
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Source: Masters Abstracts International, Volume: 44-02, page: 0985.
Thesis (M.A.Sc.)--University of Toronto, 2005.
Electronic version licensed for access by U. of T. users.
GERSTEIN MICROTEXT copy on microfiche (2 microfiches).
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