The third order optical nonlinear character of ZnSe nanocrystals doped silica glasses

• Published in: Journal of electroceramics 2008-12, Vol.21 (1-4), p.737-740
• Main Authors: Wan, Xing, Yao, Xi, Wang, Minqiang, Hao, Haiyan
• Format: Article
• Language: English
• Subjects: Beams (radiation); Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystallography and Scattering Methods; Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics; Electrochemistry; Energy gap; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Glass; Materials Science; Nanocrystals; Natural Materials; Nonlinear optics; Nonlinearity; Optical and Electronic Materials; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Optics; Physics; Silica glass; Sol gel process; Zinc selenides
• ISSN: 1385-3449; 1573-8663
• DOI: 10.1007/s10832-007-9287-z

ZnSe/SiO 2 composites were fabricated with conventional sol–gel synthesis method. The absorption spectra of the semiconductor-doped glasses (SDGs) were presented and compared among different ZnSe doping amounts. The energy gap ( E g ) decreased distinctly as the content of ZnSe QDs increased. Nonlinear refractive indexes were measured by single beam Z-scan technique. The results revealed that the third order nonlinear susceptibility was efficiently affected by E g , which was explained by local field effect and Kramers–Kronig (KK) relation.