Annealing effect on reflectivity spectra of opal photonic crystals
| Autor: | Vladimir S. Gorelik, G. A. Emel’chenko, N. I. Yurasov, Vladimir M. Masalov, Yu. P. Voinov, V. V. Gryaznov |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Scanning electron microscope business.industry Annealing (metallurgy) General Chemical Engineering Metals and Alloys Analytical chemistry Physics::Optics Bragg's law Reflectivity Spectral line Inorganic Chemistry Optics Materials Chemistry High Energy Physics::Experiment SPHERES business Argon atmosphere Photonic crystal |
| Zdroj: | Inorganic Materials. 45:645-650 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s0020168509060120 |
| Popis: | We analyze broadband visible reflectivity spectra of opal photonic crystals annealed in an argon atmosphere and air. Scanning electron microscopic examination has shown that the crystals consist of close-packed spheres with a mean diameter in the range 200–290 nm. Incorporation of even small amounts of carbon (≃0.5 wt %) increases the density of the opal matrix. The presence of carbon shifts the Bragg reflection peak of the opal and increases its intensity. |
| Databáze: | OpenAIRE |
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