Preparation and optical property of island silver films embedded in silica

Zhenquan Lai; Bin Zhou; Jue Wang; S. M. Attia; Qinyuan Zhang; Li Zhao; Jiayu Wang; Xuejian Yan

doi:10.1117/12.408477

29 November 2000 Preparation and optical property of island silver films embedded in silica

Zhenquan Lai, Bin Zhou, Jue Wang, S. M. Attia, Qinyuan Zhang, Li Zhao, Jiayu Wang, Xuejian Yan

Proceedings Volume 4086, Fourth International Conference on Thin Film Physics and Applications; (2000) https://doi.org/10.1117/12.408477
Event: 4th International Conference on Thin Film Physics and Applications, 2000, Shanghai, China

Abstract

Island silver films (nanoclusters, quantum dots) embedded in silica are prepared on silicon wafers and glasses by sputtering. Atomic force microscope is used to characterize the morphology and distribution of silver nanoclusters, the size of nanoclusters varies from several ten to several hundred nanometers. Linear optical absorption spectra of annealed samples have a blue-shift compare to that of as- prepared samples, it suggests thermal treatment decomposes large clusters to small clusters. Z-scan technique is applied to study the third-order non-linear optical properties. It is found that the embedded silver nanoclusters present remarkable third order nonlinear effect even if the size of silver nanoclusters are as large as several tens to several hundreds nanometers. Thermal treatment leads to a slight reduction in NRIC, indicating annealing also dissolve tiny nanoclusters. The size distribution of silver nanoclusters therefore becomes centralized after thermal treatment.

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Zhenquan Lai, Bin Zhou, Jue Wang, S. M. Attia, Qinyuan Zhang, Li Zhao, Jiayu Wang, and Xuejian Yan "Preparation and optical property of island silver films embedded in silica", Proc. SPIE 4086, Fourth International Conference on Thin Film Physics and Applications, (29 November 2000); https://doi.org/10.1117/12.408477

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KEYWORDS

Silver

Absorption

Silica

Optical properties

Nonlinear optics

Sputter deposition

Glasses

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