6533b7d9fe1ef96bd126c034
RESEARCH PRODUCT
Light scattering in opal heterojunctions
Rudolf ZentelMarc EgenC. M. Sotomayor TorresSergei G. Romanovsubject
Materials sciencebusiness.industryScatteringMultiangle light scatteringCondensed Matter PhysicsMolecular physicsAtomic and Molecular Physics and OpticsLight scatteringElectronic Optical and Magnetic MaterialsCondensed Matter::Materials Sciencesymbols.namesakeOpticsHardware and ArchitecturesymbolsGrazing-incidence small-angle scatteringScattering theoryElectrical and Electronic EngineeringBiological small-angle scatteringRayleigh scatteringbusinessBallistic photondescription
Light propagation in photonic hetero-crystals, consisting of two opal films with different lattice constants, has been investigated in the realistic regime of weak scattering, when the main light flux is transported by ballistic photons. The light scattering at the photonic bandgap interface is studied in combination with transmission data. The spectra and directionality diagrams of scattered light of single- and hetero-opal films are compared. The rate of decrease of the scattering intensity as a function of the scattering angle has been used to quantify the scattering strength. The anisotropy of the interface scattering is identified by deducing the trajectories of single scattered photons from scattered light spectra. It is found that the weak scattering regime is preserved in the hetero-opal. Moreover, the diffusively scattered light leaving the double-film is mostly generated in the film, which faces the detector.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-05-01 | Photonics and Nanostructures - Fundamentals and Applications |