Nanostructure and Optical Properties of Silver Helical Pentagon Nanosculptured Thin Films

Abstract EN

Silver helical pentagon shaped nanosculptured thin films (HPNSTFs) were produced using oblique angle deposition method in conjunction with the rotation of sample holder under controlled conditions.

The s-polarization extinction spectra obtained at different azimuthal angles (φ) and low incidence angle (i.e., 10∘) from the Ag (HPNSTF) did not show significant change in the plasmon peak position, while at higher incidence angle (i.e., 70∘) a blue shift appeared for the broad peak which was observed for lower incidence angle (i.e., 10∘) and occurred at lower wavelength.

In case of p-polarized light a very broad peak was obtained for the 70∘ incidence angle and for different φ angles and when compared with the lower incidence angle results it can be concluded that it is gone under a red shift.

Polar diagrams of the samples showed slight anisotropy that should be due to high symmetry of the pentagon helical structure.