The optical dielectric function of ZnO

Near-field-assisted localization: effect of size and filling factor of randomly distributed zinc oxide nanoneedles on multiple scattering and localization of light

“…This works particularly well for ZnO nanostructures due to their large second-order susceptibility [32]. Yet, a careful data analysis is needed since the coherent SH emission around 400 nm is accompanied by incoherent, multiphoton-induced photoluminescence (MPL) from the ZnO nanorods [33].…”

“…Due to its high band gap of 3.3 eV, ZnO is nearly transparent for visible and IR light [30] with an absorption length of nearly 200 µm at 800 nm [31]. Furthermore, the refractive index of n = 1.96 in the near-IR is rather large, giving rise to a high scattering efficiency [32].…”

Optical Properties of ZnO Alloys

“…Above the bandgap where light is strongly absorbed, refl ectivity or ellipsometry measurements can be used to obtain the refractive index. The complete dielectric function has also been computed theoretically, and has been experimentally determined using ellipsometry [27,28] In the vicinity of the exciton resonance the index of refraction sharply increases due to the Kramers-Kronig relation. Using generalized ellipsometry, the dielectric function for ZnO platelets grown by vapor-phase transport has been measured, as shown in .…”

Modification of Emission Properties of ZnO Layers due to Plasmonic Near-Field Coupling to Ag Nanoislands

“…We estimate that for the thickness and the absorption coefficient [8] of the ZnO layer, its absorption is negligible. Accordingly, for energies below the band gap of the GaN template (∼3.42 eV at 300 K), the observed extinction results from the interaction of light with the Ag nanoislands.…”