Optical analysis of the fine crystalline structure of artificial opal films
Herein, we present a detailed analysis of the structure of artificial opal films. We demonstrate that, rather than the generally assumed face centered cubic lattice of spheres, opal films are better approximated by rhombohedral assemblies of distorted colloids. Detailed analysis of the optical respo...
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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v25_n22_p12860_Lozano http://hdl.handle.net/20.500.12110/paper_07437463_v25_n22_p12860_Lozano |
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paper:paper_07437463_v25_n22_p12860_Lozano2023-06-08T15:44:56Z Optical analysis of the fine crystalline structure of artificial opal films Artificial opals Close-packed planes Crystalline structure Face centered cubic lattice Interparticle distances Normal direction Opal films Optical analysis Optical response Photonic band structures Wide spectral range Herein, we present a detailed analysis of the structure of artificial opal films. We demonstrate that, rather than the generally assumed face centered cubic lattice of spheres, opal films are better approximated by rhombohedral assemblies of distorted colloids. Detailed analysis of the optical response in a very wide spectral range (0.4 ≤ a/λ ≤ 2, where a is the conventional lattice constant), as well as at perpendicular and off-normal directions, unambiguously shows that the interparticle distance coincides very approximately with the expected diameter only along directions contained in the same close-packed plane but differs significantly in directions oblique to the [111] one. A full description of the real and reciprocal lattices of actual opal films is provided, as well as of the photonic band structure of the proposed arrangement. The implications of this distortion in the optical response of the lattice are discussed. © 2009 American Chemical Society. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v25_n22_p12860_Lozano http://hdl.handle.net/20.500.12110/paper_07437463_v25_n22_p12860_Lozano |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Artificial opals Close-packed planes Crystalline structure Face centered cubic lattice Interparticle distances Normal direction Opal films Optical analysis Optical response Photonic band structures Wide spectral range |
| spellingShingle |
Artificial opals Close-packed planes Crystalline structure Face centered cubic lattice Interparticle distances Normal direction Opal films Optical analysis Optical response Photonic band structures Wide spectral range Optical analysis of the fine crystalline structure of artificial opal films |
| topic_facet |
Artificial opals Close-packed planes Crystalline structure Face centered cubic lattice Interparticle distances Normal direction Opal films Optical analysis Optical response Photonic band structures Wide spectral range |
| description |
Herein, we present a detailed analysis of the structure of artificial opal films. We demonstrate that, rather than the generally assumed face centered cubic lattice of spheres, opal films are better approximated by rhombohedral assemblies of distorted colloids. Detailed analysis of the optical response in a very wide spectral range (0.4 ≤ a/λ ≤ 2, where a is the conventional lattice constant), as well as at perpendicular and off-normal directions, unambiguously shows that the interparticle distance coincides very approximately with the expected diameter only along directions contained in the same close-packed plane but differs significantly in directions oblique to the [111] one. A full description of the real and reciprocal lattices of actual opal films is provided, as well as of the photonic band structure of the proposed arrangement. The implications of this distortion in the optical response of the lattice are discussed. © 2009 American Chemical Society. |
| title |
Optical analysis of the fine crystalline structure of artificial opal films |
| title_short |
Optical analysis of the fine crystalline structure of artificial opal films |
| title_full |
Optical analysis of the fine crystalline structure of artificial opal films |
| title_fullStr |
Optical analysis of the fine crystalline structure of artificial opal films |
| title_full_unstemmed |
Optical analysis of the fine crystalline structure of artificial opal films |
| title_sort |
optical analysis of the fine crystalline structure of artificial opal films |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v25_n22_p12860_Lozano http://hdl.handle.net/20.500.12110/paper_07437463_v25_n22_p12860_Lozano |
| _version_ |
1768542132180615168 |