Research Papers

Effective refractive index of face-centered-cubic and hexagonal close-packed 250 nm-SiO2 based colloidal crystals

[+] Author Affiliations
Juan Carlos Salcedo-Reyes

Pontificia Universidad Javeriana, Thin Films and Nanophotonics Group, Physics Department, Cr. 7 No. 40-37, Ed. 53, Lab. 414, Bogotá, D.C., Colombia

J. Nanophoton. 6(1), 063518 (Aug 07, 2012). doi:10.1117/1.JNP.6.063518
History: Received February 22, 2012; Revised July 6, 2012; Accepted July 10, 2012
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Abstract.  A quantitative kinematic analysis, of the refraction properties of face-centered-cubic and hexagonal close-packed 250 nm-SiO2-based colloidal crystals, was performed using the plane wave expansion method. The angle-dependent effective refractive index, for different frequencies, was calculated taking into account the continuity of the tangential component of the wave vector across the interface and the energy conservation principle as well. The results demonstrate that the unusual optical properties, of the close packed SiO2-based colloidal crystals, depend strongly on the sphere-packing symmetry rather than from the material itself.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Juan Carlos Salcedo-Reyes
"Effective refractive index of face-centered-cubic and hexagonal close-packed 250 nm-SiO2 based colloidal crystals", J. Nanophoton. 6(1), 063518 (Aug 07, 2012). ; http://dx.doi.org/10.1117/1.JNP.6.063518


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