Absorption and photoluminescence properties of silver clusters in SiO2 matrix
详细信息 查看全文
- 作者：Igor A. Gladskikh ; Polina V. Gladskikh…
- 关键词：Silver cluster ; Thin film ; Dielectric matrix ; Absorption ; Luminescence
- 刊名：Optical and Quantum Electronics
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：49
- 期：1
- 全文大小：
- 刊物主题：Optics, Lasers, Photonics, Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
- 出版者：Springer US
- ISSN：1572-817X
- 卷排序：49
文摘
Absorption and luminescence properties of silver nanoclusters embedded in SiO2 matrixes were studied experimentally. Thin SiO2 films with different amount of silver were produced by co-deposition of Ag and SiO2 onto the silica substrates in vacuum. The thus obtained films possess three peaks in absorption spectra at 297, 329 and 401 nm and two peaks in luminescence spectra at about 500 and 650 nm. We ascribed these spectral features to silver nanoclusters of different sizes that present in the film. Thermal annealing transforms both absorption and emission spectra of the films. Lager clusters that are formed after annealing possess one absorption band at 350–450 nm and one luminescence band at 510 nm. The luminescence was observed only in samples with the silver content of less than 2.2%. Quenching of the luminescence in samples with higher concentration of silver is due to the presence of larger particles with plasmonic properties.