Quantum Dots in Sol-Gel Films for NLO Effects

Lam et al. [23] used sol-gel processing to prepare CdS NPs capped with 3-(mer-captopropyl)trimethoxysilane (MPTMS = HS(CH2)3Si(OCH3)3). The Z-scan technique has been used to examine the effect of the synthesis route on of the doped thin films. 

In this chapter, the characterization of sol-gel-derived films and planar waveguides by optical spectroscopy methods has been reviewed and discussed. FTIR, Raman, UV-Vis-NIR, and fluorescence spectroscopies were used to analyze the structures of sol-gel inorganic or hybrid optical films. NP sizes in films doped with noble metal NPs or quantum dots have also been reviewed. Optical loss and Z-scan measurements on sol-gel optical waveguides or NP-doped sol-gel films were also discussed. 

2 Orignac, X., Barbier, D Du, X.M., Almeida, R.M., McCarthy, 0 and Yeatman, E. (1999) Sol-gel silica/titania-on-silicon Er/Yb-doped waveguides for 

and Almeida, R.M. (2000) Preparation and characterization of germanium sulfide based sol-gel planar waveguides. /. Sol-Gel Sci. TechnoL, 19, 243-248. 

4 Pelissier, S., Blanc, D., Andrews, M.P., Najafi, S.I., Tishchenko, A.V., and Parriaux, O. (1999) Single-step UV recording of sinusoidal surfiice gratings in hybrid sol-gel passes. Appl, Opt, 38 (32), 6744-6748, 

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