Enhanced linear sphere size dependence of photonic band gaps for 3D nanocomposite magnetic photonic crystals
2010 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550Article in journal (Other academic) Submitted
Silica spheres in the size range (70-650) nm, containing embedded nano-sized magnetic iron oxide particles have been synthesized and arranged into 3D-face-centered-cubic (fcc) structured magnetic photonic crystals (MPCs) with the (111) crystal plane parallel to the glass substrate surface. Five photonic band gaps (PBGs) are observed in the optical transmission spectra measured over UV-Vis-near IR range for MPCs. The peak wavelengths of the PBGs (λC) are found to increase linearly with the sphere size (Φ). Furthermore, on embedding magnetic nanoparticles the position of PBGs is shifted to higher wavelengths. In addition, the average refractive index, 1.5 ± 0.1, obtained for the MPCs from the slopes of λC(Φ) is found to be larger than the reported value of 1.349 for pure silica PCs.
Place, publisher, year, edition, pages
Atom and Molecular Physics and Optics Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-31402OAI: oai:DiVA.org:kth-31402DiVA: diva2:403577
QS 201203152011-03-142011-03-142012-03-15Bibliographically approved