Nonlinear Optical Properties of Mushroom-Shaped CdSe/CdS Coreshells
The third-order nonlinear optical susceptibilities of mushroom-shaped CdSe/CdS coreshells as a function of concentration have been investigated using polarization- and concentration-resolved degenerate four-wave mixing in a resonant region. The effective third-order nonlinear optical susceptibilities, |χ (3) xxxx | and |χ (3) xyyx |, of CdSe/CdS coreshells were estimated to be ∼1.86 × 10−21–1.03 × 10−20 m2/V2, and ∼0.45 × 10−21–6.15 × 10−21 m2/V2, respectively, for various concentrations of ∼0.64 × 10−3–4.95 × 10−3 mol/m3. The second hyperpolarizabilities, |〈γh 〉 xxxx | and |〈γh 〉 xyyx |, of CdSe/CdS coreshells were extracted to be ∼2.37 × 10−41 m5/V2 and ∼1.29 × 10−41 m5/V2, respectively.
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Document Type: Research Article
Publication date: February 1, 2009
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