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Titolo:
Study of optical properties of metallic Au-x(SiO2)(1-x) and Ni-x(SiO2)(1-x) films
Autore:
Wang, Y; Zhang, XX; Yan, X; Zhang, RJ; Chen, LY; Zheng, YX; Wang, SY; Zhou, SM; Yang, YM; Dai, N;
Indirizzi:
Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China Fudan Univ Shanghai Peoples R China 200433 nghai 200433, Peoples R China Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China Hong Kong Univ Sci & Technol Hong Kong Hong Kong Peoples R China R China
Titolo Testata:
PHYSICA B
fascicolo: 1-3, volume: 279, anno: 2000,
pagine: 113 - 115
SICI:
0921-4526(200004)279:1-3<113:SOOPOM>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEMS;
Keywords:
magnetic metallic films; granular metallic films; optical properties;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, LY Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China Fudan Univ Shanghai Peoples R China 200433 433, Peoples R China
Citazione:
Y. Wang et al., "Study of optical properties of metallic Au-x(SiO2)(1-x) and Ni-x(SiO2)(1-x) films", PHYSICA B, 279(1-3), 2000, pp. 113-115

Abstract

To study the optical properties of the metal-insulator granular films, a series of Ni-x(SiO2)(1-x) and Au-x(SiO2)(1-x) granular films was made with avariation of x and the annealing process. The complex dielectric function was measured in the 1.5-4.8-eV photon energy range. New spectral features were found in the dielectric functions. For Au,(SiO2)(1-x) samples, a new peak in the epsilon(2) spectra is seen around 2 eV, especially for x = 0.67. The epsilon(1) spectra change continuously from positive to negative in thelow photon energy range, resulting in a true zero of epsilon(1) associatedwith the plasmon occurring at 2.0-2.5 eV and at about 3.6 eV for the Au- and Ni-based films, respectively. Compared to previous data, the experimental results obtained in this work provide richer information to understand better the optical properties of the metal-granular films that are not well predicted by the theoretical model. The effect will be useful in the metallic multilayer structure design and applications. (C) 2000 Elsevier Science B. V. All rights reserved.

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Documento generato il 06/04/20 alle ore 03:11:20