Highly efficient amplified stimulated emission from CdSe-CdS-ZnS quantum dot doped waveguides with two-photon infrared optical pumping

Jacek J. Jasieniak, Ilaria Fortunati, Samuele Gardin, Raffaella Signorini, Renato Bozio, Alessandro Martucci, Paul Mulvaney

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The process of two-photon optical pumping at 800 nm t, which allows for the generation of highly stable, amplified stimulated emission from a variety of CdSe-CdS-ZnS sized nanocyrstals was investigated. The process was found to be as efficient as conventional excitation mechanisms in the 1-photon excitation region. The CdSe cores were prepared by the method describe by Van Embden et al. The CdSe-CdS-ZnS quantum dots were prepared through adapted synthetic protocols of Li et al. A zinc rich surface was created to ensure the resulting nanoparticles,which possessed both high PL yield and photostability. The nanocrystal were rendered soluble in ethanol through 5-aminopentanol and tris-hydroxyphosphine surface exchange and further incorporated into Zirconia sol-gel matrix by using a protocol. The post synthesis of the nanocrystal surface chemistry was tailored to ensure homogenous nanocrystal, which incorporate into zirconia based waveguides.

Original languageEnglish
Pages (from-to)69-73
Number of pages5
JournalAdvanced Materials
Issue number1
Publication statusPublished - 7 Jan 2008
Externally publishedYes

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